UpHeron
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Servers and applications

CVE-2026-91769

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…

Severity
Medium 4.3
Published
25 Sept 2026
Last changed
23 Oct 2026
Added to UpHeron
24 Oct 2026
Fixed in
8.2.34, 8.3.35, 8.4.26, 8.5.11
Sources
NVD

Affected software

SoftwareAffected versions
PHPServers and applications · cpe:a:php:php
  • From 8.2.0 before 8.2.34
  • From 8.3.0 before 8.3.35
  • From 8.4.0 before 8.4.26
  • From 8.5.0 before 8.5.11

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2026-91769
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2026-91769