VULNERABILITY INTELLIGENCE

CVE-2025-66220

CVSS score5 MEDIUM
EPSS probability0.17%
CISA KEVNot currently listed
Published2025-12-03
Last modified2026-09-25
CVSS vectorCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:L/A:N

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.

Weakness classification

  • security-advisories@github.com: CWE-170

Primary references