{"id":"CVE-2026-7259","summary":"Null pointer dereference in php_mb_check_encoding() via mb_ereg_search_init()","details":"In PHP versions 8.2.* before 8.2.31, 8.3.* before 8.3.31, 8.4.* before 8.4.21, and 8.5.* before 8.5.6, a mismatch between encoding lists in Oniguruma and mbfl leads to  a NULL pointer dereference, resulting in a segmentation fault and denial of service. The vulnerability is exploitable when user-controlled input can influence the encoding passed to mb_regex_encoding().","aliases":["BIT-libphp-2026-7259","BIT-php-2026-7259","BIT-php-min-2026-7259","GHSA-wm6j-2649-pv75"],"modified":"2026-11-11T02:55:53.295576806Z","published":"2026-05-10T04:13:26.766Z","related":["ALSA-2026:23388","ALSA-2026:33449","SUSE-SU-2026:1957-1","SUSE-SU-2026:1958-1","SUSE-SU-2026:2037-1","SUSE-SU-2026:21612-1","openSUSE-SU-2026:10747-1","openSUSE-SU-2026:20745-1"],"database_specific":{"cna_assigner":"php","cwe_ids":["CWE-476"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/7xxx/CVE-2026-7259.json"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/7xxx/CVE-2026-7259.json"},{"type":"ADVISORY","url":"https://github.com/php/php-src/security/advisories/GHSA-wm6j-2649-pv75"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-7259"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/php/php-src","events":[{"introduced":"70ee6c20ad97e02c2b8098aeea96fefbbc3ac5c2"},{"fixed":"48ed910b47285a1377f93f92557b8e401623dce0"},{"introduced":"d26068059e83fe40de3430a512471d194119bee0"},{"fixed":"dff62b8bdb21a5d610ef08e4291277724724c4d7"},{"introduced":"b437f2b32eb364c9496d24abcc734272e5c9c980"},{"fixed":"7a64ae0507799547fbbd39b067bd3dd2c35e8fec"},{"introduced":"685e99655ae97c667950f7f7d176985958718f56"},{"fixed":"fcc29c8d6d6ee6f5ba2d941f0a2a6ea6aa6ee633"}],"database_specific":{"extracted_events":[{"cpe":"cpe:2.3:a:php:php:*:*:*:*:*:*:*:*","range":[{"introduced":"8.2.0"},{"fixed":"8.2.31"}],"source":"CPE_RANGE"},{"range":[{"introduced":"8.3.0"},{"fixed":"8.3.31"}],"source":"CPE_RANGE","cpe":"cpe:2.3:a:php:php:*:*:*:*:*:*:*:*"},{"source":"CPE_RANGE","cpe":"cpe:2.3:a:php:php:*:*:*:*:*:*:*:*","range":[{"introduced":"8.4.0"},{"fixed":"8.4.21"}]},{"source":"CPE_RANGE","cpe":"cpe:2.3:a:php:php:*:*:*:*:*:*:*:*","range":[{"introduced":"8.5.0"},{"fixed":"8.5.6"}]}]}}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-7259.json"}}],"schema_version":"1.9.2","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:L/AU:Y/U:Amber"}]}