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CVE-2026-85781— Unverified access point ownership in Amazon EFS CSI Driver

Quick assessment

Affected
aws aws-efs-csi-driver
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 Amazon EFS CSI 驱动的卷删除组件中，如果未在 v3.4.1 版本之前对存储访问点的归属进行验证，拥有 PersistentVolume 创建权限的已认证 Kubernetes 用户可能通过构造一个将某一个文件系统的访问点与另一个不同的目标文件系统配对的 PersistentVolume ，从而触发对其未授权访问的 EFS 文件系统中目录的递归删除。 要解决此问题，用户应升级至 v3.4.1 版本。

CVSS 8.7 · High

Affected Version Matrix 1

VendorProduct Version RangeStatus
aws aws-efs-csi-driver ≤ 3.4.0 affected
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I. Basic Information for CVE-2026-85781

Vulnerability Information
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Vulnerability Title
Unverified access point ownership in Amazon EFS CSI Driver
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
未经验证的属主
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
aws aws-efs-csi-driver 0 ~ 3.4.0 -

II. Public POCs for CVE-2026-85781

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III. Intelligence Information for CVE-2026-85781

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Vendor Advisories for CVE-2026-85781 (1)

Vendor Pages for CVE-2026-85781 (1)

IV. Related Vulnerabilities

Same vendor: aws
Same weakness: CWE-283

V. Comments for CVE-2026-85781

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