BIT-ENVOY-2025-66220

BIT-ENVOY-2025-66220 PUBLISHED CVSS 5 MEDIUM

Record from circl · Published December 3, 2025

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

Query this with the API

The same record, from the CLI:

vulnetix vdb vuln BIT-ENVOY-2025-66220
vulnetix vdb fixes BIT-ENVOY-2025-66220

Or with curl, using the org id and key from your account page:

curl -s -H "Authorization: ApiKey ${VULNETIX_ORG_ID}:${VULNETIX_API_KEY}" \
  "https://api.vdb.vulnetix.com/v2/vuln/BIT-ENVOY-2025-66220/fixes/registry"

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References

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

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