What is the CVSS score of CVE-2026-2331?

CVE-2026-2331 has a CVSS 3.1 base score of 9.8 (Critical). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.2%.

How to fix or mitigate CVE-2026-2331?

Within 24 hours: Inventory all AppEngine deployments and identify which versions are affected; immediately isolate or disable public HTTP access to AppEngine Fileaccess endpoints. Within 7 days: Implement network segmentation to restrict AppEngine traffic; deploy Web Application Firewall (WAF) rules to block suspicious file access patterns; conduct forensic analysis for signs of exploitation. Within 30 days: Monitor vendor communications for patch availability; develop and test remediation procedures; consider migration to patched versions or alternative services once available.

CVE-2026-2331

CRITICAL

Files or Directories Accessible to External Parties (CWE-552)

2026-03-06 psirt@sick.de

Path Traversal Information Disclosure

9.8

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

9.8 CRITICAL

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 22:06 vuln.today

CVE Published

Mar 06, 2026 - 08:16 nvd

CRITICAL 9.8

DescriptionCVE.org

An attacker may perform unauthenticated read and write operations on sensitive filesystem areas via the AppEngine Fileaccess over HTTP due to improper access restrictions. A critical filesystem directory was unintentionally exposed through the HTTP-based file access feature, allowing access without authentication. This includes device parameter files, enabling an attacker to read and modify application settings, including customer-defined passwords. Additionally, exposure of the custom application directory may allow execution of arbitrary Lua code within the sandboxed AppEngine environment.