High severity · published Sep 4, 2026
CVE-2026-85781
Unverified access point ownership in Amazon EFS CSI Driver
8.7
CVSS
0.4%
EPSS
No
On KEV
Description
Unverified ownership of a storage access point in the volume deletion component of the Amazon EFS CSI Driver before v3.4.1 might allow an authenticated Kubernetes user with PersistentVolume creation privileges to cause recursive deletion of directories on an EFS filesystem they are not authorized to access, via a crafted PersistentVolume volumeHandle that pairs an access point from one filesystem with a different target filesystem.
To remediate this issue, users should upgrade to version v3.4.1.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
High
User interaction
None
Confidentiality
None
Integrity
High
Availability
High
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 38% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AW
aws-efs-csi-driver · aws
through 3.4.0 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-85781
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-85781
aws.amazon.com
https://aws.amazon.com/security/security-bulletins/2026-099-aws/
github.com
https://github.com/kubernetes-sigs/aws-efs-csi-driver/releases/tag/v3.4.1
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