CVE-2025-66220Envoy is a high-performance edge/middle/service proxy.
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 7.1 HIGH (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N
- Weakness (CWE)
- CWE-170
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Analyzed
- Record last updated
- Sep 25, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
envoyproxy envoy envoyproxy:envoy | before 1.33.13; from 1.34.0 before 1.34.11; from 1.35.0 before 1.35.7; from 1.36.0 before 1.36.3 | NVD |
References
- https://github.com/envoyproxy/envoy/security/advisories/GHSA-rwjg-c3h2-f57pexploit, vendor-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.