BIT-ENVOY-2025-66220

BIT-ENVOY-2025-66220 PUBLISHED CVSS 5 MEDIUM

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.

Risk Scores

CVSS 3.1

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

Affected Products

Vendor	Product	Versions
envoyproxy	envoy	>= 1.36.0, <= 1.36.2, >= 1.35.0, <= 1.35.6, >= 1.34.0, <= 1.34.10

Timeline

Dec 3, 2025 PoC Published
Dec 3, 2025 CVE Published

References

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

Open in Interactive Console →