CVE-2025-66220

medium

Description

Envoy is a high-performance edge/middle/service proxy. In 1.33.12, 1.34.10, 1.35.6, 1.36.2, and earlier, Envoy’s mTLS certificate matcher for match_typed_subject_alt_names may incorrectly treat certificates containing an embedded null byte (\0) inside an OTHERNAME SAN value as valid matches.

References

https://docs.cloud.google.com/support/bulletins/index#gcp-2025-073

https://github.com/envoyproxy/envoy/security/advisories/GHSA-rwjg-c3h2-f57p

Details

Source: Mitre, NVD

Published: 2025-12-03

Updated: 2025-12-03

Risk Information

CVSS v2

Base Score: 5.3

Vector: CVSS2#AV:N/AC:H/Au:M/C:C/I:P/A:N

Severity: Medium

CVSS v3

Base Score: 5

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

Severity: Medium

EPSS

EPSS: 0.00049