Medium severity4.3NVD Advisory· Published Sep 25, 2026· Updated Oct 23, 2026
CVE-2026-91769
CVE-2026-91769
Description
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
43- osv-coords41 versionspkg:bitnami/libphppkg:bitnami/phppkg:bitnami/php-minpkg:rpm/almalinux/apcu-panelpkg:rpm/almalinux/libzippkg:rpm/almalinux/libzip-develpkg:rpm/almalinux/libzip-toolspkg:rpm/almalinux/phppkg:rpm/almalinux/php-bcmathpkg:rpm/almalinux/php-clipkg:rpm/almalinux/php-commonpkg:rpm/almalinux/php-dbapkg:rpm/almalinux/php-dbgpkg:rpm/almalinux/php-develpkg:rpm/almalinux/php-embeddedpkg:rpm/almalinux/php-enchantpkg:rpm/almalinux/php-ffipkg:rpm/almalinux/php-fpmpkg:rpm/almalinux/php-gdpkg:rpm/almalinux/php-gmppkg:rpm/almalinux/php-intlpkg:rpm/almalinux/php-jsonpkg:rpm/almalinux/php-ldappkg:rpm/almalinux/php-mbstringpkg:rpm/almalinux/php-mysqlndpkg:rpm/almalinux/php-odbcpkg:rpm/almalinux/php-opcachepkg:rpm/almalinux/php-pdopkg:rpm/almalinux/php-pearpkg:rpm/almalinux/php-pecl-apcupkg:rpm/almalinux/php-pecl-apcu-develpkg:rpm/almalinux/php-pecl-rrdpkg:rpm/almalinux/php-pecl-xdebugpkg:rpm/almalinux/php-pecl-zippkg:rpm/almalinux/php-pgsqlpkg:rpm/almalinux/php-processpkg:rpm/almalinux/php-snmppkg:rpm/almalinux/php-soappkg:rpm/almalinux/php-xmlpkg:rpm/almalinux/php-xmlrpcpkg:rpm/opensuse/php8&distro=openSUSE%20Tumbleweed
>= 8.2.0, < 8.2.34+ 40 more
- (no CPE)range: >= 8.2.0, < 8.2.34
- (no CPE)range: >= 8.2.0, < 8.2.34
- (no CPE)range: >= 8.2.0, < 8.2.34
- (no CPE)range: < 5.1.18-1.module_el8.6.0+2750+78feabcb
- (no CPE)range: < 1.6.1-1.module_el8.6.0+2750+78feabcb
- (no CPE)range: < 1.6.1-1.module_el8.10.0+3935+28808425
- (no CPE)range: < 1.6.1-1.module_el8.10.0+3935+28808425
- (no CPE)range: < 7.4.33-8.module_el8.10.0+4321+cf5fd4bb
- (no CPE)range: < 7.4.33-8.module_el8.10.0+4321+cf5fd4bb
- (no CPE)range: < 7.4.33-8.module_el8.10.0+4321+cf5fd4bb
- (no CPE)range: < 7.4.33-8.module_el8.10.0+4321+cf5fd4bb
- (no CPE)range: < 7.4.33-8.module_el8.10.0+4321+cf5fd4bb
- (no CPE)range: < 7.4.33-8.module_el8.10.0+4321+cf5fd4bb
- (no CPE)range: < 7.4.33-8.module_el8.10.0+4321+cf5fd4bb
- (no CPE)range: < 7.4.33-8.module_el8.10.0+4321+cf5fd4bb
- (no CPE)range: < 7.4.33-8.module_el8.10.0+4321+cf5fd4bb
- (no CPE)range: < 7.4.33-8.module_el8.10.0+4321+cf5fd4bb
- (no CPE)range: < 7.4.33-8.module_el8.10.0+4321+cf5fd4bb
- (no CPE)range: < 7.4.33-8.module_el8.10.0+4321+cf5fd4bb
- (no CPE)range: < 7.4.33-8.module_el8.10.0+4321+cf5fd4bb
- (no CPE)range: < 7.4.33-8.module_el8.10.0+4321+cf5fd4bb
- (no CPE)range: < 7.4.33-8.module_el8.10.0+4321+cf5fd4bb
- (no CPE)range: < 7.4.33-8.module_el8.10.0+4321+cf5fd4bb
- (no CPE)range: < 7.4.33-8.module_el8.10.0+4321+cf5fd4bb
- (no CPE)range: < 7.4.33-8.module_el8.10.0+4321+cf5fd4bb
- (no CPE)range: < 7.4.33-8.module_el8.10.0+4321+cf5fd4bb
- (no CPE)range: < 7.4.33-8.module_el8.10.0+4321+cf5fd4bb
- (no CPE)range: < 7.4.33-8.module_el8.10.0+4321+cf5fd4bb
- (no CPE)range: < 1:1.10.13-1.module_el8.10.0+3935+28808425
- (no CPE)range: < 5.1.18-1.module_el8.10.0+3935+28808425
- (no CPE)range: < 5.1.18-1.module_el8.6.0+2750+78feabcb
- (no CPE)range: < 2.0.1-1.module_el8.6.0+2750+78feabcb
- (no CPE)range: < 2.9.5-1.module_el8.6.0+3239+bedf0508
- (no CPE)range: < 1.18.2-1.module_el8.10.0+3935+28808425
- (no CPE)range: < 7.4.33-8.module_el8.10.0+4321+cf5fd4bb
- (no CPE)range: < 7.4.33-8.module_el8.10.0+4321+cf5fd4bb
- (no CPE)range: < 7.4.33-8.module_el8.10.0+4321+cf5fd4bb
- (no CPE)range: < 7.4.33-8.module_el8.10.0+4321+cf5fd4bb
- (no CPE)range: < 7.4.33-8.module_el8.10.0+4321+cf5fd4bb
- (no CPE)range: < 7.4.33-8.module_el8.10.0+4321+cf5fd4bb
- (no CPE)range: < 8.5.11-1.1
Patches
Vulnerability mechanics
References
1- github.com/php/php-src/security/advisories/GHSA-vvx9-73fr-5jjxnvdVendor AdvisoryExploit
News mentions
0No linked articles in our index yet.