Vulnpedia
← Search CVEs

CVE-2026-110306

MEDIUM 6.1

Published 2026-10-20 · Last modified 2026-10-20

fast-uri is a dependency-free RFC 3986 URI parser and serializer for Node.js. In versions before 2.4.8, from 3.0.0 through 3.1.8, and from 4.0.0 through 4.2.2, fast-uri percent-decodes the scheme component with the legacy global unescape() function before validating it, so an input whose decoded scheme is a dangerous token is emitted as a live scheme even though RFC 3986 does not allow percent-encoding in a scheme and no other parser accepts it. An application that screens dangerous schemes on the raw input and then stores or renders the normalized or resolved result can turn an inert string into an executable javascript, data, or vbscript URL, producing a stored or reflected cross-site scripting vector, and the equal() comparison treats an encoded and a plain scheme as the same, which can bypass equality-based allowlists. The issue is fixed in fast-uri 2.4.8, 3.1.9, and 4.2.3, and users should upgrade to one of these versions or later. As a workaround, reject input whose scheme part contains a percent sign, or check the parsed scheme against an allowlist after normalization and use that same parsed result rather than the raw string.

NO EXPLOITATION SIGNALS

No known exploitation, public exploit, or elevated probability at this time. Track for changes.

Exploitation likelihood

0.3%chance of exploitation in 30 days · 16th percentile

○ In CISA KEV ○ Catalogued PoC

Impact if exploited

6.1CVSS 3.1 · MEDIUM

  • ConfidentialityLow
  • IntegrityLow
  • AvailabilityNone

What an attacker needs

  • ✓Access: Reachable over the network — no local access needed
  • ✓Privileges: No account or privileges required
  • ⚠User interaction: A user must take an action (click / open a file)
  • ✓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:

Affected

Vendors Fast Uri

Products Fast Uri

Weakness (CWE)

  • CWE-172: : Encoding Error
  • CWE-180: : Incorrect Behavior Order: Validate Before Canonicalize

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

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.

  • fast-uri npm

    pkg:npm/fast-uri

    SEMVER range
    • All earlier versions (introduced 0)
    • Fixed boundary (excluded): 2.4.8
    Additional upstream package constraints
    {
  "database": {
    "source": "https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/10/GHSA-w74x-v6f9-j3xg/GHSA-w74x-v6f9-j3xg.json"
  }
}
    GitHub Advisory Database · GHSA-w74x-v6f9-j3xg · Updated 2026-10-23T21:45:04.896137439Z
  • fast-uri npm

    pkg:npm/fast-uri

    SEMVER range
    • Introduced version (included): 3.0.0
    • Fixed boundary (excluded): 3.1.9
    Additional upstream package constraints
    {
  "database": {
    "source": "https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/10/GHSA-w74x-v6f9-j3xg/GHSA-w74x-v6f9-j3xg.json"
  }
}
    GitHub Advisory Database · GHSA-w74x-v6f9-j3xg · Updated 2026-10-23T21:45:04.896137439Z
  • fast-uri npm

    pkg:npm/fast-uri

    SEMVER range
    • Introduced version (included): 4.0.0
    • Fixed boundary (excluded): 4.2.3
    Additional upstream package constraints
    {
  "database": {
    "source": "https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/10/GHSA-w74x-v6f9-j3xg/GHSA-w74x-v6f9-j3xg.json"
  }
}
    GitHub Advisory Database · GHSA-w74x-v6f9-j3xg · Updated 2026-10-23T21:45:04.896137439Z

Vendor product assessments

Showing 32 of 150 vendor product statements; 118 omitted. Read the full vendor advisory.

  • costmanagement/costmanagement-ui-rhel10 as a component of Cost Management On Premise · known affected

    Vendor assessment for this product only.

    pkg:oci/costmanagement-ui-rhel10@sha256:39700faac93e613fdd8139aed7b6dbb79a4d542f3f3cca6be04c4edce72eaf5d?repository_url=registry.redhat.io/costmanagement/costmanagement-ui-rhel10

    • none available: Fix deferred
    Red Hat · CVE-2026-110306 · Updated 2026-10-20T11:09:01+00:00
  • network-observability/network-observability-console-plugin-rhel9 as a component of Network Observability Operator · known affected

    Vendor assessment for this product only.

    pkg:oci/network-observability-console-plugin-rhel9@sha256:fb8fba794fda8541fdaa0f2fcfa6467068abbaa0b4d6d497bc46837bf38a750a?repository_url=registry.redhat.io/network-observability/network-observability-console-plugin-rhel9

    • none available: Fix deferred
    Red Hat · CVE-2026-110306 · Updated 2026-10-20T11:09:01+00:00
  • openshift-pipelines/pipelines-hub-ui-rhel8 as a component of OpenShift Pipelines · known affected

    Vendor assessment for this product only.

    pkg:oci/pipelines-hub-ui-rhel8@sha256:f20c772aeadcf5abf5c44a8d42b1ce03ee285aba297ba44f324a012c485b9645?repository_url=registry.redhat.io/openshift-pipelines/pipelines-hub-ui-rhel8

    • none available: Fix deferred
    Red Hat · CVE-2026-110306 · Updated 2026-10-20T11:09:01+00:00
  • amq-broker-maven-repository.zip as a component of Red Hat AMQ Broker 7 · known affected

    Vendor assessment for this product only.

    pkg:generic/[email protected]

    • none available: Fix deferred
    Red Hat · CVE-2026-110306 · Updated 2026-10-20T11:09:01+00:00
  • automation-platform-ui.src as a component of Red Hat Ansible Automation Platform 2 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/[email protected]?arch=src

    • none available: Fix deferred
    Red Hat · CVE-2026-110306 · Updated 2026-10-20T11:09:01+00:00
  • rhdh/red-hat-developer-hub-backstage-plugin-orchestrator as a component of Red Hat Developer Hub · known affected

    Vendor assessment for this product only.

    pkg:oci/red-hat-developer-hub-backstage-plugin-orchestrator@sha256:3aa39a8c3b7bf33aeaae5b3f924d0a2f7625e64657ce9b5517a3a73620f142bb?repository_url=registry.redhat.io/rhdh/red-hat-developer-hub-backstage-plugin-orchestrator

    • none available: Fix deferred
    Red Hat · CVE-2026-110306 · Updated 2026-10-20T11:09:01+00:00
  • rhdh/rhdh-hub-rhel9 as a component of Red Hat Developer Hub · known affected

    Vendor assessment for this product only.

    pkg:oci/rhdh-hub-rhel9@sha256:ea53db6012b6fe1c80760624caddb0d3b674614b62cb3c359ed3fde270314eb2?repository_url=registry.redhat.io/rhdh/rhdh-hub-rhel9

    • none available: Fix deferred
    Red Hat · CVE-2026-110306 · Updated 2026-10-20T11:09:01+00:00
  • rhem/flightctl-ui-ocp-rhel9 as a component of Red Hat Edge Manager 1 · known affected

    Vendor assessment for this product only.

    pkg:oci/flightctl-ui-ocp-rhel9@sha256:f25989a62885c089c0f2317e9bafac8008dedd05b311a35aa63074a1f6c16377?repository_url=registry.redhat.io/rhem/flightctl-ui-ocp-rhel9

    • none available: Fix deferred
    Red Hat · CVE-2026-110306 · Updated 2026-10-20T11:09:01+00:00
  • cockpit-image-builder as a component of Red Hat Enterprise Linux 10 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/cockpit-image-builder

    • none available: Fix deferred
    Red Hat · CVE-2026-110306 · Updated 2026-10-20T11:09:01+00:00
  • dotnet-runtime-dbg-8.0 as a component of Red Hat Enterprise Linux 10 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/dotnet-runtime-dbg-8.0

    • none available: Fix deferred
    Red Hat · CVE-2026-110306 · Updated 2026-10-20T11:09:01+00:00
  • dotnet-templates-8.0 as a component of Red Hat Enterprise Linux 10 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/dotnet-templates-8.0

    • none available: Fix deferred
    Red Hat · CVE-2026-110306 · Updated 2026-10-20T11:09:01+00:00
  • grafana-selinux as a component of Red Hat Enterprise Linux 10 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/grafana-selinux

    • none available: Fix deferred
    Red Hat · CVE-2026-110306 · Updated 2026-10-20T11:09:01+00:00
  • sgx-mpa as a component of Red Hat Enterprise Linux 10 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/sgx-mpa

    • none available: Fix deferred
    Red Hat · CVE-2026-110306 · Updated 2026-10-20T11:09:01+00:00
  • aspnetcore-runtime-8.0 as a component of Red Hat Enterprise Linux 8 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/aspnetcore-runtime-8.0

    • none available: Fix deferred
    Red Hat · CVE-2026-110306 · Updated 2026-10-20T11:09:01+00:00
  • dotnet-host as a component of Red Hat Enterprise Linux 8 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/dotnet-host

    • none available: Fix deferred
    Red Hat · CVE-2026-110306 · Updated 2026-10-20T11:09:01+00:00
  • dotnet-sdk-8.0-source-built-artifacts as a component of Red Hat Enterprise Linux 8 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/dotnet-sdk-8.0-source-built-artifacts

    • none available: Fix deferred
    Red Hat · CVE-2026-110306 · Updated 2026-10-20T11:09:01+00:00
  • netstandard-targeting-pack-2.1 as a component of Red Hat Enterprise Linux 8 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/netstandard-targeting-pack-2.1

    • none available: Fix deferred
    Red Hat · CVE-2026-110306 · Updated 2026-10-20T11:09:01+00:00
  • dotnet-host as a component of Red Hat Enterprise Linux 9 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/dotnet-host

    • none available: Fix deferred
    Red Hat · CVE-2026-110306 · Updated 2026-10-20T11:09:01+00:00
  • dotnet-sdk-8.0-source-built-artifacts as a component of Red Hat Enterprise Linux 9 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/dotnet-sdk-8.0-source-built-artifacts

    • none available: Fix deferred
    Red Hat · CVE-2026-110306 · Updated 2026-10-20T11:09:01+00:00
  • linux-sgx.src as a component of Red Hat Enterprise Linux 9 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/linux-sgx?arch=src

    • none available: Fix deferred
    Red Hat · CVE-2026-110306 · Updated 2026-10-20T11:09:01+00:00
  • sgx-pccs as a component of Red Hat Enterprise Linux 9 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/sgx-pccs

    • none available: Fix deferred
    Red Hat · CVE-2026-110306 · Updated 2026-10-20T11:09:01+00:00
  • rhelai3/bootc-gaudi-rhel9 as a component of Red Hat Enterprise Linux AI (RHEL AI) 3 · known affected

    Vendor assessment for this product only.

    pkg:oci/bootc-gaudi-rhel9@sha256:e1057b59ca1be9501332abf97230855e85c7df858356be0da9dce230ea7e98e1?repository_url=registry.redhat.io/rhelai3/bootc-gaudi-rhel9

    • none available: Fix deferred
    Red Hat · CVE-2026-110306 · Updated 2026-10-20T11:09:01+00:00
  • rhoai/odh-core-bff-rhel9 as a component of Red Hat OpenShift AI (RHOAI) · known affected

    Vendor assessment for this product only.

    pkg:oci/odh-core-bff-rhel9@sha256:e683d11de1a782b2a796c99eccb5dfb3b908e721210ba87c2e06768f1fa8745d?repository_url=registry.redhat.io/rhoai/odh-core-bff-rhel9

    • none available: Fix deferred
    Red Hat · CVE-2026-110306 · Updated 2026-10-20T11:09:01+00:00
  • rhoai/odh-mod-arch-automl-rhel9 as a component of Red Hat OpenShift AI (RHOAI) · known affected

    Vendor assessment for this product only.

    pkg:oci/odh-mod-arch-automl-rhel9@sha256:93239529dd6854c6b03a9ded073fa6d1f07eb7377b56bf466669ab539919e48d?repository_url=registry.redhat.io/rhoai/odh-mod-arch-automl-rhel9

    • none available: Fix deferred
    Red Hat · CVE-2026-110306 · Updated 2026-10-20T11:09:01+00:00
  • rhoai/odh-mod-arch-mlflow-rhel9 as a component of Red Hat OpenShift AI (RHOAI) · known affected

    Vendor assessment for this product only.

    pkg:oci/odh-mod-arch-mlflow-rhel9@sha256:53674c7c6aa3d0e35160f4297fe15411230ebbd6d67092c8b4905e898b98e5ec?repository_url=registry.redhat.io/rhoai/odh-mod-arch-mlflow-rhel9

    • none available: Fix deferred
    Red Hat · CVE-2026-110306 · Updated 2026-10-20T11:09:01+00:00
  • openshift4/ose-monitoring-plugin-rhel9 as a component of Red Hat OpenShift Container Platform 4 · known affected

    Vendor assessment for this product only.

    pkg:oci/ose-monitoring-plugin-rhel9@sha256:229583810adef94017fa3dd3a408b91a4eeda3b17371d790d9158ebee7d584c3?repository_url=registry.redhat.io/openshift4/ose-monitoring-plugin-rhel9

    • none available: Fix deferred
    Red Hat · CVE-2026-110306 · Updated 2026-10-20T11:09:01+00:00
  • devspaces/code-rhel9 as a component of Red Hat OpenShift Dev Spaces · known affected

    Vendor assessment for this product only.

    pkg:oci/code-rhel9@sha256:2a80ac1e2c7f68dd5b726d49b5a660959de0036d992356bb742eb08349563dec?repository_url=registry.redhat.io/devspaces/code-rhel9

    • none available: Fix deferred
    Red Hat · CVE-2026-110306 · Updated 2026-10-20T11:09:01+00:00
  • quay/quay-rhel9 as a component of Red Hat Quay 3 · known affected

    Vendor assessment for this product only.

    pkg:oci/quay-rhel9@sha256:b46e49899b93a545a51f89574bbbb3f15c73389a978626e223b8e536a9ca7f46?repository_url=registry.redhat.io/quay/quay-rhel9

    • no fix planned: Out of support scope
    Red Hat · CVE-2026-110306 · Updated 2026-10-20T11:09:01+00:00
  • satellite/iop-host-inventory-frontend-rhel9 as a component of Red Hat Satellite 6 · known affected

    Vendor assessment for this product only.

    pkg:oci/iop-host-inventory-frontend-rhel9@sha256:7c39ecb6f63fa79890ec88707870eb2f665fa49de6e42eb5c41807044725933a?repository_url=registry.redhat.io/satellite/iop-host-inventory-frontend-rhel9

    • none available: Fix deferred
    Red Hat · CVE-2026-110306 · Updated 2026-10-20T11:09:01+00:00
  • ansible-automation-platform/bootc-automation-portal-rhel9 as a component of Self-service automation portal 2 · known affected

    Vendor assessment for this product only.

    pkg:oci/bootc-automation-portal-rhel9@sha256:8553c734145775879bdfe2befa9f2df1c22c6d7db2f2251401c3cc517a7e0394?repository_url=registry.redhat.io/ansible-automation-platform/bootc-automation-portal-rhel9

    • none available: Fix deferred
    Red Hat · CVE-2026-110306 · Updated 2026-10-20T11:09:01+00:00
  • dotnet8.0.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/dotnet8.0?arch=src

    Red Hat · CVE-2026-110306 · Updated 2026-10-20T11:09:01+00:00
  • prometheus3.13.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-2026-110306 · Updated 2026-10-20T11:09:01+00:00

All CVSS metrics

  • MEDIUM 6.1 v3.1 · CNA Primary
    CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
  • MEDIUM 6.1 v3.1 · NVD Secondary
    CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

References

Advisories

Technical & other

Sources: NVD · CVE.org · EPSS