{"id":"BIT-php-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-min-2026-7259","CVE-2026-7259"],"modified":"2026-05-12T10:56:26.523241472Z","published":"2026-05-12T08:56:05.400Z","database_specific":{"severity":"Low","cpes":["cpe:2.3:a:php:php:*:*:*:*:*:*:*:*"]},"references":[{"type":"WEB","url":"https://github.com/php/php-src/security/advisories/GHSA-wm6j-2649-pv75"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-7259"}],"affected":[{"package":{"name":"php","ecosystem":"Bitnami","purl":"pkg:bitnami/php"},"ranges":[{"type":"SEMVER","events":[{"introduced":"8.2.0"},{"fixed":"8.2.31"},{"introduced":"8.3.0"},{"fixed":"8.3.31"},{"introduced":"8.4.0"},{"fixed":"8.4.21"},{"introduced":"8.5.0"},{"fixed":"8.5.6"}]}],"database_specific":{"source":"https://github.com/bitnami/vulndb/tree/main/data/php/BIT-php-2026-7259.json"},"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:Y/R:X/V:X/RE:X/U:Amber"}]}],"schema_version":"1.7.5"}