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CVE-2026-103505

MEDIUM 6.9

Published 2026-10-01 · Last modified 2026-10-09

Improper neutralization of argument delimiters in the volume handling component in AWS EFS CSI Driver (aws-efs-csi-driver) v3.1.0 through v3.4.2 might allow remote authenticated users with PersistentVolume creation permissions to inject arbitrary mount options via comma-separated values in the mounttargetipmap volumeAttribute. To remediate this issue, users should upgrade to version v3.5.0 or later.

NO EXPLOITATION SIGNALS

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

Exploitation likelihood

0.4%chance of exploitation in 30 days · 37th percentile

○ In CISA KEV ○ Catalogued PoC

Impact if exploited

6.9CVSS 4.0 · MEDIUM

  • ConfidentialityNone
  • IntegrityHigh
  • AvailabilityNone

What an attacker needs

  • ✓Access: Reachable over the network — no local access needed
  • ⚠Privileges: Requires an admin / high-privilege account
  • ✓User interaction: No user interaction needed
  • ✓Complexity: No special conditions — reliably repeatable
  • ⚠Requirements: Specific conditions must be present

✓ lowers the bar for an attacker · ⚠ raises it

Proof of concept

No public PoC is currently catalogued.

Search for new PoCs

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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 Aws

Products Aws Efs Csi Driver

Weakness (CWE)

  • CWE-88: Improper neutralization of argument delimiters in a command ('argument injection')

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:N/VI:H/VA:N/SC:H/SI:N/SA:N

References and research data (JSON)

Vendor product assessments

  • openshift4/ose-aws-efs-csi-driver-container-rhel8 as a component of Red Hat OpenShift Container Platform 4 · known affected

    Vendor assessment for this product only.

    pkg:oci/ose-aws-efs-csi-driver-container-rhel8@sha256:33c0b7e2354d05e7c349af22e8c491ee07604e01d8d490cadc5c943661a9e87a?repository_url=registry.redhat.io/openshift4/ose-aws-efs-csi-driver-container-rhel8

    • workaround: Restrict PersistentVolume creation permissions to trusted users and follow least-privilege RBAC practices. Upgrade the AWS EFS CSI Driver to version 3.5.0 or later when the corresponding Red Hat update is available. Until then, avoid using the affected mounttargetipmap attribute with untrusted input.
    • none available: Fix deferred
    Red Hat · CVE-2026-103505 · Updated 2026-10-02T14:40:45+00:00
  • openshift4/ose-aws-efs-csi-driver-container-rhel9 as a component of Red Hat OpenShift Container Platform 4 · known affected

    Vendor assessment for this product only.

    pkg:oci/ose-aws-efs-csi-driver-container-rhel9@sha256:a2b03fce52dce1e5a3894818b0943bef2881aff78977821c6735b70619d92a1a?repository_url=registry.redhat.io/openshift4/ose-aws-efs-csi-driver-container-rhel9

    • workaround: Restrict PersistentVolume creation permissions to trusted users and follow least-privilege RBAC practices. Upgrade the AWS EFS CSI Driver to version 3.5.0 or later when the corresponding Red Hat update is available. Until then, avoid using the affected mounttargetipmap attribute with untrusted input.
    • none available: Fix deferred
    Red Hat · CVE-2026-103505 · Updated 2026-10-02T14:40:45+00:00

All CVSS metrics

  • MEDIUM 6.5 v3.1 · CNA Primary
    CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N
  • MEDIUM 6.9 v4.0 · CNA Primary
    CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:N/VI:H/VA:N/SC:H/SI:N/SA:N
  • MEDIUM 6.9 v4.0 · NVD Secondary
    CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:N/VI:H/VA:N/SC:H/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
  • MEDIUM 6.5 v3.1 · NVD Secondary
    CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N

References

Patches & mitigations

Advisories

Technical & other

Sources: NVD · CVE.org · EPSS