CVE-2026-61801
MEDIUM 5.5The `github.com/moby/sys/user` package provides Go utilities for parsing and looking up entries in Unix-style user and group database files. Versions before 0.4.1 do not sufficiently limit entries when parsing `/etc/passwd`- or `/etc/group`-style files, allowing an attacker who can supply a specially crafted file to cause excessive memory consumption and potentially terminate the affected process due to an out-of-memory condition. This issue is patched in version 0.4.1. As a workaround, avoid parsing attacker-controlled user or group database files, or validate and limit untrusted input before parsing it.
No known exploitation, public exploit, or elevated probability at this time. Track for changes.
Exploitation likelihood
0.1%chance of exploitation in 30 days · 2nd percentile
Impact if exploited
5.5CVSS 3.1 · MEDIUM
- ConfidentialityNone
- IntegrityNone
- AvailabilityHigh
What an attacker needs
- ⚠Access: Requires local access to the host
- ⚠Privileges: Requires a low-privilege account
- ✓User interaction: No user interaction needed
- ✓Complexity: No special conditions — reliably repeatable
✓ lowers the bar for an attacker · ⚠ raises it
Proof of concept
No public PoC is currently catalogued.
Search for new PoCs
Search GitHub now — results may be empty or unverified.
Tracked sources are checked daily for recent CVEs, including PoCs published after the original disclosure. A later release appears after a tracked source lists it and a refresh succeeds.
Data snapshot:
Weakness (CWE)
- CWE-400: : Uncontrolled Resource Consumption
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
References and research data (JSON)
Packages and version ranges
Each advisory describes its own package and affected ranges. A boundary applies to that range; it is not a universal upgrade recommendation.
github.com/moby/sys/user Go
pkg:golang/github.com/moby/sys/user
SEMVER range- All earlier versions (introduced 0)
- Fixed boundary (excluded): 0.4.1
GitHub Advisory Database · GHSA-mjcv-p78q-w5fw · Updated 2026-10-19T21:40:47.349593935ZAdditional upstream package constraints
{ "database": { "last_known_affected_version_range": "<= 0.4.0", "source": "https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/10/GHSA-mjcv-p78q-w5fw/GHSA-mjcv-p78q-w5fw.json" } }github.com/moby/sys/user Go
pkg:golang/github.com/moby/sys/user
SEMVER range- All earlier versions (introduced 0)
- Fixed boundary (excluded): 0.4.1
Go Vulnerability Database · GO-2026-6686 · Updated 2026-10-19T21:31:35.458679290ZAdditional upstream package constraints
{ "ecosystem": { "imports": [ { "path": "github.com/moby/sys/user", "symbols": [ "CurrentGroup", "GetAdditionalGroups", "GetAdditionalGroupsPath", "GetExecUser", "GetExecUserPath", "LookupGid", "LookupGroup", "ParseGroup", "ParseGroupFile", "ParseGroupFileFilter", "ParseGroupFilter" ] } ] }, "database": { "source": "https://vuln.go.dev/ID/GO-2026-6686.json" } }
Vendor product assessments
Showing 32 of 336 vendor product statements; 304 omitted. Read the full vendor advisory.
grafana12.4-0:12.4.12-0.4.hum1@aarch64 as a component of Red Hat Hardened Images · fixed
Vendor assessment for this product only.
pkg:rpm/redhat/[email protected]?arch=aarch64&distro=hummingbird-20251124&repository_id=public-hummingbird-aarch64-rpms
- vendor fix: For details on how to apply this update, which includes the changes described in this advisory, refer to: https://images.redhat.com/ Vendor guidance
- workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
grafana12.4-0:12.4.12-0.4.hum1@src as a component of Red Hat Hardened Images · fixed
Vendor assessment for this product only.
pkg:rpm/redhat/[email protected]?arch=src&distro=hummingbird-20251124&repository_id=public-hummingbird-source-rpms
- vendor fix: For details on how to apply this update, which includes the changes described in this advisory, refer to: https://images.redhat.com/ Vendor guidance
- workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
grafana12.4-0:12.4.12-0.4.hum1@x86_64 as a component of Red Hat Hardened Images · fixed
Vendor assessment for this product only.
pkg:rpm/redhat/[email protected]?arch=x86_64&distro=hummingbird-20251124&repository_id=public-hummingbird-x86_64-rpms
- vendor fix: For details on how to apply this update, which includes the changes described in this advisory, refer to: https://images.redhat.com/ Vendor guidance
- workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
grafana13.1-0:13.1.7-0.1.hum1@aarch64 as a component of Red Hat Hardened Images · fixed
Vendor assessment for this product only.
pkg:rpm/redhat/[email protected]?arch=aarch64&distro=hummingbird-20251124&repository_id=public-hummingbird-aarch64-rpms
- vendor fix: For details on how to apply this update, which includes the changes described in this advisory, refer to: https://images.redhat.com/ Vendor guidance
- workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
grafana13.1-0:13.1.7-0.1.hum1@src as a component of Red Hat Hardened Images · fixed
Vendor assessment for this product only.
pkg:rpm/redhat/[email protected]?arch=src&distro=hummingbird-20251124&repository_id=public-hummingbird-source-rpms
- vendor fix: For details on how to apply this update, which includes the changes described in this advisory, refer to: https://images.redhat.com/ Vendor guidance
- workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
grafana13.1-0:13.1.7-0.1.hum1@x86_64 as a component of Red Hat Hardened Images · fixed
Vendor assessment for this product only.
pkg:rpm/redhat/[email protected]?arch=x86_64&distro=hummingbird-20251124&repository_id=public-hummingbird-x86_64-rpms
- vendor fix: For details on how to apply this update, which includes the changes described in this advisory, refer to: https://images.redhat.com/ Vendor guidance
- workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
grafana13.2-0:13.2.3-0.1.hum1@aarch64 as a component of Red Hat Hardened Images · fixed
Vendor assessment for this product only.
pkg:rpm/redhat/[email protected]?arch=aarch64&distro=hummingbird-20251124&repository_id=public-hummingbird-aarch64-rpms
- vendor fix: For details on how to apply this update, which includes the changes described in this advisory, refer to: https://images.redhat.com/ Vendor guidance
- workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
grafana13.2-0:13.2.3-0.1.hum1@src as a component of Red Hat Hardened Images · fixed
Vendor assessment for this product only.
pkg:rpm/redhat/[email protected]?arch=src&distro=hummingbird-20251124&repository_id=public-hummingbird-source-rpms
- vendor fix: For details on how to apply this update, which includes the changes described in this advisory, refer to: https://images.redhat.com/ Vendor guidance
- workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
grafana13.2-0:13.2.3-0.1.hum1@x86_64 as a component of Red Hat Hardened Images · fixed
Vendor assessment for this product only.
pkg:rpm/redhat/[email protected]?arch=x86_64&distro=hummingbird-20251124&repository_id=public-hummingbird-x86_64-rpms
- vendor fix: For details on how to apply this update, which includes the changes described in this advisory, refer to: https://images.redhat.com/ Vendor guidance
- workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
assisted/agent-preinstall-image-builder-rhel9 as a component of Assisted Installer for Red Hat OpenShift Container Platform 2 · known affected
Vendor assessment for this product only.
pkg:oci/agent-preinstall-image-builder-rhel9@sha256:85a570ea209d0ac4800c5314dcf04bd30f9f89119e91223d450e29f3b9444c47?repository_url=registry.redhat.io/assisted/agent-preinstall-image-builder-rhel9
- workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
- no fix planned: Out of support scope
lightspeed-core/rag-tool-cpu-rhel9 as a component of Lightspeed Core · known affected
Vendor assessment for this product only.
pkg:oci/rag-tool-cpu-rhel9@sha256:ec8e42910dd3a7109d90bf77bb47e198a1580875117dc4b5365b5a85d2d8325c?repository_url=registry.redhat.io/lightspeed-core/rag-tool-cpu-rhel9
- workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
- none available: Fix deferred
multicluster-globalhub/multicluster-globalhub-manager-rhel9 as a component of Multicluster Global Hub · known affected
Vendor assessment for this product only.
pkg:oci/multicluster-globalhub-manager-rhel9@sha256:6c0b3f002aac0debb7d52811d21d9f8fc9d0cf2e9d2aaf92a8f47bf8093481c7?repository_url=registry.redhat.io/multicluster-globalhub/multicluster-globalhub-manager-rhel9
- workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
- none available: Fix deferred
advanced-cluster-security/rhacs-operator-bundle as a component of Red Hat Advanced Cluster Security 4 · known affected
Vendor assessment for this product only.
pkg:oci/rhacs-operator-bundle@sha256:347a16467b2685d3984307f64d688b7a04612a3587241325c29df936a8ca8625?repository_url=registry.redhat.io/advanced-cluster-security/rhacs-operator-bundle
- workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
- none available: Fix deferred
rhceph/grafana-rhel9 as a component of Red Hat Ceph Storage 8 · known affected
Vendor assessment for this product only.
pkg:oci/grafana-rhel9@sha256:8bcb8976618246bc3c73f7986b7d566d9d26cda16c6043f6820f6efa2f8a3c2c?repository_url=registry.redhat.io/rhceph/grafana-rhel9
- workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
- none available: Fix deferred
rhem/flightctl-imagebuilder-worker-rhel9 as a component of Red Hat Edge Manager 1 · known affected
Vendor assessment for this product only.
pkg:oci/flightctl-imagebuilder-worker-rhel9@sha256:ad3e3eb6f2f6f328edd57ffa898ca25a7ece9787a59a709fe62629ca6985b6fa?repository_url=registry.redhat.io/rhem/flightctl-imagebuilder-worker-rhel9
- workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
- none available: Fix deferred
osbuild-composer-core as a component of Red Hat Enterprise Linux 10 · known affected
Vendor assessment for this product only.
pkg:rpm/redhat/osbuild-composer-core
- workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
- none available: Fix deferred
podman-catatonit (container-tools:rhel8) as a component of Red Hat Enterprise Linux 8 · known affected
Vendor assessment for this product only.
pkg:rpm/redhat/podman-catatonit?rpmmod=container-tools:rhel8
- workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
- none available: Fix deferred
osbuild-composer-dnf-json as a component of Red Hat Enterprise Linux 9 · known affected
Vendor assessment for this product only.
pkg:rpm/redhat/osbuild-composer-dnf-json
- workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
- none available: Fix deferred
ubi9/skopeo as a component of Red Hat Enterprise Linux 9 · known affected
Vendor assessment for this product only.
pkg:oci/skopeo@sha256:7c4df9c709381266811fa74e0a2b28be7ce8f69f1502280747b0f26cc674b6f0?repository_url=registry.redhat.io/ubi9/skopeo
- workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
- none available: Fix deferred
rhoai/odh-workbench-jupyter-datascience-cpu-py312-rhel9 as a component of Red Hat OpenShift AI (RHOAI) · known affected
Vendor assessment for this product only.
pkg:oci/odh-workbench-jupyter-datascience-cpu-py312-rhel9@sha256:d42aafacf60f441165985ee9b3218cefe0632024b04ae4067cba72b441168a10?repository_url=registry.redhat.io/rhoai/odh-workbench-jupyter-datascience-cpu-py312-rhel9
- workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
- none available: Fix deferred
openshift-kni/commatrix as a component of Red Hat OpenShift Container Platform 4 · known affected
Vendor assessment for this product only.
pkg:oci/commatrix@sha256:107732baa92c1620a84f6df9bc3b062599d9d83d3f6bacc7f6caa7595d740dae?repository_url=registry.redhat.io/openshift-kni/commatrix
- workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
- none available: Fix deferred
openshift4/ose-cli-artifacts-rhel9 as a component of Red Hat OpenShift Container Platform 4 · known affected
Vendor assessment for this product only.
pkg:oci/ose-cli-artifacts-rhel9@sha256:a475c0e807a29b2bd13403a82188cb7bcca7d03def92d5299fc1f9534cfd7e75?repository_url=registry.redhat.io/openshift4/ose-cli-artifacts-rhel9
- workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
- none available: Fix deferred
openshift4/ose-operator-framework-tools-rhel9 as a component of Red Hat OpenShift Container Platform 4 · known affected
Vendor assessment for this product only.
pkg:oci/ose-operator-framework-tools-rhel9@sha256:5d2a6c8403ceedbc51b801cb7845d0ba98c7167f5ffe6511b723d47a19b0883f?repository_url=registry.redhat.io/openshift4/ose-operator-framework-tools-rhel9
- workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
- none available: Fix deferred
skopeo as a component of Red Hat OpenShift Container Platform 4 · known affected
Vendor assessment for this product only.
pkg:rpm/redhat/skopeo
- workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
- none available: Fix deferred
web-terminal/web-terminal-tooling-rhel9 as a component of Red Hat Web Terminal · known affected
Vendor assessment for this product only.
pkg:oci/web-terminal-tooling-rhel9@sha256:f985f3d5a9940b3cf5e231d35973d5295013242d0220756241ed5c2be0744537?repository_url=registry.redhat.io/web-terminal/web-terminal-tooling-rhel9
- workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
- none available: Fix deferred
buildah.src as a component of Red Hat Hardened Images · known not affected
Vendor assessment for this product only.
Reason: component not present
pkg:rpm/redhat/buildah?arch=src
Red Hat · CVE-2026-61801 · Updated 2026-10-15T11:20:56+00:00containers-common.src as a component of Red Hat Hardened Images · known not affected
Vendor assessment for this product only.
Reason: component not present
pkg:rpm/redhat/[email protected]?arch=src
Red Hat · CVE-2026-61801 · Updated 2026-10-15T11:20:56+00:00grype.src as a component of Red Hat Hardened Images · known not affected
Vendor assessment for this product only.
Reason: component not present
pkg:rpm/redhat/[email protected]?arch=src
Red Hat · CVE-2026-61801 · Updated 2026-10-15T11:20:56+00:00podman.src as a component of Red Hat Hardened Images · known not affected
Vendor assessment for this product only.
Reason: component not present
pkg:rpm/redhat/podman?arch=src
Red Hat · CVE-2026-61801 · Updated 2026-10-15T11:20:56+00:00skopeo.src as a component of Red Hat Hardened Images · known not affected
Vendor assessment for this product only.
Reason: component not present
pkg:rpm/redhat/skopeo?arch=src
Red Hat · CVE-2026-61801 · Updated 2026-10-15T11:20:56+00:00syft.src as a component of Red Hat Hardened Images · known not affected
Vendor assessment for this product only.
Reason: component not present
pkg:rpm/redhat/[email protected]?arch=src
Red Hat · CVE-2026-61801 · Updated 2026-10-15T11:20:56+00:00trivy.src as a component of Red Hat Hardened Images · known not affected
Vendor assessment for this product only.
Reason: component not present
pkg:rpm/redhat/[email protected]?arch=src
Red Hat · CVE-2026-61801 · Updated 2026-10-15T11:20:56+00:00
All CVSS metrics
- MEDIUM 5.5 v3.1 · CNA Primary
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - MEDIUM 5.5 v3.1 · NVD Secondary
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
References
Advisories
- https://github.com/moby/sys/security/advisories/GHSA-mjcv-p78q-w5fw CVE record · GitHub_M · Updated 2026-10-08T16:22:25.558Z
NVD · CVE-2026-61801 · Updated 2026-10-08T21:35:53.890
GitHub Advisory Database · GHSA-mjcv-p78q-w5fw
Go Vulnerability Database · GO-2026-6686
GitHub Advisory Database · GHSA-mjcv-p78q-w5fw · Updated 2026-10-19T21:40:47.349593935Z
Red Hat · CVE-2026-61801 · Updated 2026-10-15T11:20:56+00:00 - https://osv.dev/vulnerability/GHSA-mjcv-p78q-w5fw GitHub Advisory Database · GHSA-mjcv-p78q-w5fw
GitHub Advisory Database · GHSA-mjcv-p78q-w5fw · Updated 2026-10-19T21:40:47.349593935Z - https://osv.dev/vulnerability/GO-2026-6686 Go Vulnerability Database · GO-2026-6686
Go Vulnerability Database · GO-2026-6686 · Updated 2026-10-19T21:31:35.458679290Z - https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-61801.json Red Hat · CVE-2026-61801 · Updated 2026-10-15T11:20:56+00:00
- https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-95094 EUVD · EUVD-2026-95094
Technical & other
- https://github.com/moby/sys/pull/221 CVE record · GitHub_M · Updated 2026-10-08T16:22:25.558Z
NVD · CVE-2026-61801 · Updated 2026-10-08T21:35:53.890
GitHub Advisory Database · GHSA-mjcv-p78q-w5fw
Go Vulnerability Database · GO-2026-6686
GitHub Advisory Database · GHSA-mjcv-p78q-w5fw · Updated 2026-10-19T21:40:47.349593935Z
Red Hat · CVE-2026-61801 · Updated 2026-10-15T11:20:56+00:00 - https://github.com/moby/sys/commit/85a71bbe1faa36c552a960e6a5f3d0cfb632fbbe CVE record · GitHub_M · Updated 2026-10-08T16:22:25.558Z
NVD · CVE-2026-61801 · Updated 2026-10-08T21:35:53.890
GitHub Advisory Database · GHSA-mjcv-p78q-w5fw
Go Vulnerability Database · GO-2026-6686
GitHub Advisory Database · GHSA-mjcv-p78q-w5fw · Updated 2026-10-19T21:40:47.349593935Z
Red Hat · CVE-2026-61801 · Updated 2026-10-15T11:20:56+00:00 - https://github.com/moby/sys GitHub Advisory Database · GHSA-mjcv-p78q-w5fw
GitHub Advisory Database · GHSA-mjcv-p78q-w5fw · Updated 2026-10-19T21:40:47.349593935Z - https://access.redhat.com/security/cve/CVE-2026-61801 Red Hat · CVE-2026-61801 · Updated 2026-10-15T11:20:56+00:00
- https://bugzilla.redhat.com/show_bug.cgi?id=2548048 Red Hat · CVE-2026-61801 · Updated 2026-10-15T11:20:56+00:00
- https://www.cve.org/CVERecord?id=CVE-2026-61801 Red Hat · CVE-2026-61801 · Updated 2026-10-15T11:20:56+00:00
- https://nvd.nist.gov/vuln/detail/CVE-2026-61801 Red Hat · CVE-2026-61801 · Updated 2026-10-15T11:20:56+00:00
- https://access.redhat.com/errata/RHSA-2026:76677 Red Hat · CVE-2026-61801 · Updated 2026-10-15T11:20:56+00:00
- https://access.redhat.com/errata/RHSA-2026:76448 Red Hat · CVE-2026-61801 · Updated 2026-10-15T11:20:56+00:00
- https://access.redhat.com/errata/RHSA-2026:76430 Red Hat · CVE-2026-61801 · Updated 2026-10-15T11:20:56+00:00