CVE-2025-66220EPSS p5.5%

CVE-2025-66220CVE-2025-66220

envoyproxy / envoy

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.

Scoring

CVSS 5.0 ()
VectorCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:L/A:N
EPSS0.17% probability of exploitation · percentile 5.5% · 2026-10-05T12:00:23Z
Last modified2026-09-25
Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.