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.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alpine Linux | — | Upgrade php83Upgrade php84Upgrade php85 | Sep 28, 2026 | Sep 25, 2026 |
| Amazon_linux_2023 | — | Upgrade php8.2-debuginfoUpgrade php8.2-gd-debuginfoUpgrade php8.3-processUpgrade php8.4Upgrade php8.5-common-debuginfoUpgrade php8.5-cli-debuginfoUpgrade php8.2-soap-debuginfoUpgrade php8.2-mbstring-debuginfoUpgrade php8.3-process-debuginfoUpgrade php8.3-pdo-debuginfoUpgrade php8.2-fpm-debuginfoUpgrade php8.3-ffi-debuginfoUpgrade php8.4-cli-debuginfoUpgrade php8.2-pgsqlUpgrade php8.3-bcmathUpgrade php8.3-dbaUpgrade php8.4-dbaUpgrade php8.5-dba-debuginfoUpgrade php8.2-fpmUpgrade php8.4-xmlUpgrade php8.5-zipUpgrade php8.3-enchant-debuginfoUpgrade php8.2-ldapUpgrade php8.4-snmpUpgrade php8.4-tidyUpgrade php8.2-sodium-debuginfoUpgrade php8.3-soapUpgrade php8.5-embeddedUpgrade php8.4-enchant-debuginfoUpgrade php8.5-cliUpgrade php8.5-debuginfoUpgrade php8.2-mbstringUpgrade php8.4-enchantUpgrade php8.3-fpmUpgrade php8.3-ldap-debuginfoUpgrade php8.4-fpm-debuginfoUpgrade php8.3-pgsql-debuginfoUpgrade php8.2-ffi-debuginfoUpgrade php8.5-dbaUpgrade php8.4-gdUpgrade php8.4-odbc-debuginfoUpgrade php8.2-odbcUpgrade php8.2-odbc-debuginfoUpgrade php8.5-mbstringUpgrade php8.2-pdo-debuginfoUpgrade php8.4-embedded-debuginfoUpgrade php8.4-modphpUpgrade php8.4-pgsql-debuginfoUpgrade php8.2-zipUpgrade php8.3-embeddedUpgrade php8.5-odbc-debuginfoUpgrade php8.5-dbg-debuginfoUpgrade php8.3-gmpUpgrade php8.4-sodiumUpgrade php8.2-pdoUpgrade php8.2-process-debuginfoUpgrade php8.2-snmp-debuginfoUpgrade php8.2-processUpgrade php8.3-dbg-debuginfoUpgrade php8.2-gmpUpgrade php8.3-snmp-debuginfoUpgrade php8.5-bcmathUpgrade php8.2-cliUpgrade php8.2-embedded-debuginfoUpgrade php8.3-soap-debuginfoUpgrade php8.4-ffi-debuginfoUpgrade php8.5-odbcUpgrade php8.3-bcmath-debuginfoUpgrade php8.4-ldap-debuginfoUpgrade php8.4-ldapUpgrade php8.2-embeddedUpgrade php8.4-pgsqlUpgrade php8.3-odbcUpgrade php8.4-ffiUpgrade php8.4-intl-debuginfoUpgrade php8.3-develUpgrade php8.5-enchantUpgrade php8.4-commonUpgrade php8.4-debuginfoUpgrade php8.4-gmp-debuginfoUpgrade php8.5-ffiUpgrade php8.3-mbstring-debuginfoUpgrade php8.3-modphpUpgrade php8.3-dba-debuginfoUpgrade php8.3-pgsqlUpgrade php8.2-gmp-debuginfoUpgrade php8.4-bcmathUpgrade php8.5-intl-debuginfoUpgrade php8.5-mysqlndUpgrade php8.2-bcmathUpgrade php8.2-common-debuginfoUpgrade php8.5-sodium-debuginfoUpgrade php8.2-opcacheUpgrade php8.4-gmpUpgrade php8.4-mbstringUpgrade php8.4-pdoUpgrade php8.2-xml-debuginfoUpgrade php8.3-modphp-debuginfoUpgrade php8.3-tidyUpgrade php8.2-tidy-debuginfoUpgrade php8.3-xml-debuginfoUpgrade php8.5-snmpUpgrade php8.5-sodiumUpgrade php8.4-bcmath-debuginfoUpgrade php8.4-mysqlnd-debuginfoUpgrade php8.3-ldapUpgrade php8.3-sodium-debuginfoUpgrade php8.4-snmp-debuginfoUpgrade php8.5-debugsourceUpgrade php8.3Upgrade php8.3-gdUpgrade php8.5-tidy-debuginfoUpgrade php8.3-debugsourceUpgrade php8.5-embedded-debuginfoUpgrade php8.3-ffiUpgrade php8.3-mbstringUpgrade php8.3-common-debuginfoUpgrade php8.5-ffi-debuginfoUpgrade php8.5-commonUpgrade php8.4-mysqlndUpgrade php8.2-cli-debuginfoUpgrade php8.2-bcmath-debuginfoUpgrade php8.5-processUpgrade php8.5-modphpUpgrade php8.5-gd-debuginfoUpgrade php8.4-odbcUpgrade php8.3-debuginfoUpgrade php8.5-modphp-debuginfoUpgrade php8.2-mysqlndUpgrade php8.2-develUpgrade php8.2-dbg-debuginfoUpgrade php8.2-commonUpgrade php8.2Upgrade php8.5-xml-debuginfoUpgrade php8.5-gmpUpgrade php8.4-develUpgrade php8.4-dbgUpgrade php8.4-dba-debuginfoUpgrade php8.3-sodiumUpgrade php8.3-intlUpgrade php8.3-gd-debuginfoUpgrade php8.3-fpm-debuginfoUpgrade php8.2-enchantUpgrade php8.4-fpmUpgrade php8.5-snmp-debuginfoUpgrade php8.4-xml-debuginfoUpgrade php8.4-soapUpgrade php8.4-process-debuginfoUpgrade php8.4-processUpgrade php8.4-opcacheUpgrade php8.3-zip-debuginfoUpgrade php8.2-xmlUpgrade php8.2-snmpUpgrade php8.2-pspellUpgrade php8.5-soapUpgrade php8.5-process-debuginfoUpgrade php8.5-pdoUpgrade php8.4-soap-debuginfoUpgrade php8.5-fpm-debuginfoUpgrade php8.4-common-debuginfoUpgrade php8.5-ldap-debuginfoUpgrade php8.5-xmlUpgrade php8.2-ldap-debuginfoUpgrade php8.3-commonUpgrade php8.2-pgsql-debuginfoUpgrade php8.2-mysqlnd-debuginfoUpgrade php8.2-intl-debuginfoUpgrade php8.2-intlUpgrade php8.2-gdUpgrade php8.5-soap-debuginfoUpgrade php8.5-zip-debuginfoUpgrade php8.5-gmp-debuginfoUpgrade php8.4-zip-debuginfoUpgrade php8.4-gd-debuginfoUpgrade php8.4-embeddedUpgrade php8.3-dbgUpgrade php8.3-pdoUpgrade php8.5-gdUpgrade php8.5-dbgUpgrade php8.5-pdo-debuginfoUpgrade php8.5Upgrade php8.4-sodium-debuginfoUpgrade php8.4-pdo-debuginfoUpgrade php8.4-intlUpgrade php8.4-dbg-debuginfoUpgrade php8.3-tidy-debuginfoUpgrade php8.3-opcacheUpgrade php8.3-intl-debuginfoUpgrade php8.2-sodiumUpgrade php8.2-ffiUpgrade php8.4-mbstring-debuginfoUpgrade php8.3-enchantUpgrade php8.5-fpmUpgrade php8.3-zipUpgrade php8.4-opcache-debuginfoUpgrade php8.3-mysqlnd-debuginfoUpgrade php8.3-xmlUpgrade php8.2-soapUpgrade php8.2-dba-debuginfoUpgrade php8.5-tidyUpgrade php8.2-dbaUpgrade php8.3-mysqlndUpgrade php8.5-pgsqlUpgrade php8.5-ldapUpgrade php8.5-develUpgrade php8.4-zipUpgrade php8.4-cliUpgrade php8.3-opcache-debuginfoUpgrade php8.3-embedded-debuginfoUpgrade php8.2-tidyUpgrade php8.2-pspell-debuginfoUpgrade php8.2-debugsourceUpgrade php8.3-snmpUpgrade php8.5-enchant-debuginfoUpgrade php8.3-gmp-debuginfoUpgrade php8.5-pgsql-debuginfoUpgrade php8.5-mysqlnd-debuginfoUpgrade php8.5-mbstring-debuginfoUpgrade php8.5-intlUpgrade php8.5-bcmath-debuginfoUpgrade php8.4-tidy-debuginfoUpgrade php8.3-pspellUpgrade php8.3-cli-debuginfoUpgrade php8.3-cliUpgrade php8.2-opcache-debuginfoUpgrade php8.4-debugsourceUpgrade php8.4-modphp-debuginfoUpgrade php8.3-pspell-debuginfoUpgrade php8.3-odbc-debuginfoUpgrade php8.2-zip-debuginfoUpgrade php8.2-enchant-debuginfoUpgrade php8.2-dbg | Oct 13, 2026 | Sep 25, 2026 |
| Debian | — | Upgrade php8.4Upgrade php8.2 | Sep 30, 2026 | Sep 25, 2026 |
| Redhat_linux | — | No solution exists | Sep 30, 2026 | Sep 25, 2026 |
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