Is CVE-2023-35941 actively exploited?

No active exploitation of CVE-2023-35941 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2023-35941 be exploited remotely?

Yes. CVE-2023-35941 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2023-35941?

CVE-2023-35941 has a CVSS score of 9.8 (CRITICAL).

HOME VULNERABILITIESCVE-2023-35941

CRITICAL

CVE-2023-35941

CWE-116Published: July 25, 2023· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

Envoy is an open source edge and service proxy designed for cloud-native applications. Prior to versions 1.27.0, 1.26.4, 1.25.9, 1.24.10, and 1.23.12, a malicious client is able to construct credentials with permanent validity in some specific scenarios. This is caused by the some rare scenarios in which HMAC payload can be always valid in OAuth2 filter's check. Versions 1.27.0, 1.26.4, 1.25.9, 1.24.10, and 1.23.12 have a fix for this issue. As a workaround, avoid wildcards/prefix domain wildcards in the host's domain configuration.

NVD Source

Technical Analysis

CVE-2023-35941 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.