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VulnerabilityPublished Updated

CVE-2026-6437: AWS EFS CSI Driver · Argument Injection

Affects AWS EFS CSI DriverSource CVE Database V5

0

Not known to be exploited · CVSS 6.5 Medium : upgrade to 3.0.1 when convenient.

Data as of 26 Oct 2026, 17:30 UTC

CVSS 3.1 base score
6.5Medium
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.5% chance of exploitation in 30 days – higher than 46% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 3.0.1
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 17 Apr 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

What to do

Upgrade AWS EFS CSI Driver and kubernetes-sigs/aws-efs-csi-driver to 3.0.1.

Affected software

ProductAffectedFixed in
AmazonAWS EFS CSI DriverAffected
  • <3.0.1
Fixed in
  • 3.0.1
GitHubkubernetes-sigs/aws-efs-csi-driverpkg:github/kubernetes-sigs/aws-efs-csi-driverOther threatsAffected
  • <3.0.1
Fixed in
  • 3.0.1

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

A fix is available by upgrading the AWS EFS CSI Driver to version 3.0.1. Since this is a cloud service component, AWS manages remediation for the cloud-hosted service, but users running the driver themselves should upgrade accordingly. Check the AWS security bulletin at https://aws.amazon.com/security/security-bulletins/2026-016-aws/ for the latest remediation guidance.

Description

CVE-2026-6437 is a vulnerability in the AWS EFS CSI Driver before version 3.0.1 where improper neutralization of argument delimiters allows remote authenticated users with PersistentVolume creation permissions to inject arbitrary mount options via comma injection. This can lead to high confidentiality and integrity impact but does not affect availability. The issue is fixed in version 3.0.1.

References

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