CVE search · CVE-2026-91769
CVE-2026-91769
medium 4.3
PHP's OpenSSL stream peer verification checks the certificate's subjectAltName entries first and, whenever no entry matches, falls back to the Common Name. RFC 6125 requires the CN to be ignored once the certificate presents any service identity, so a certificate carrying a non-matching DNS SAN was still accepted when its CN matched the requested peer_name. A certificate trusted by the client for one name can therefore be used to impersonate another.
Details
- Status
- Analyzed
- Published
- Last changed
- Source
- security@php.net
- Weakness
- CWE-297
Severity
| Version | Score | Vector | Source |
|---|---|---|---|
| CVSS 3.1 | medium 4.3 | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |
security@php.netSecondary |
Affected products
Vendor and product from the NVD’s CPE applicability statements. Versions and conditions are on the NVD’s page.
- php · php
References
- https://github.com/php/php-src/security/advisories/GHSA-vvx9-73fr-5jjxVendor AdvisoryExploit