CVE-2026-17544

CVE-2026-17544 — PHP bcmath OOB write → universal memory-only RCE A weaponized proof-of-concept for CVE-2026-17544 , an out-of-bounds write in PHP's rewritten bcmath extension bcstr2num. This turns the publicly known DoS-only crash into a full, universal, memory-only remote code execution primiti...

CVE-2026-17544-PoC

CVE-2026-17544 — PHP bcmath bccomp Out-of-Bounds Write Stack Smashing CVSS 9.8 Critical · CWE-787 · GHSA-x692-q9x7-8c3f Summary bcstr2num in ext/bcmath/libbcmath/src/str2num.c vendored libbcmath, PHP 8.4+ contains an off-by-N out-of-bounds write. When the user-supplied scale is smaller than the...