CVE-2026-17544highCWE-787

CVE-2026-17544: high-severity vulnerability in PHP

Out-of-bounds write in bccomp() via crafted operand and scale

Published · Updated

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41Vexday Risk Score

No sign of exploitation. It has a public proof of concept.

ssvc Attendcvss 8.1epss 0.4%
from disclosure to weapon13 days
Published on NVDJul 30
1st PoC+13d
Attacker-provided inputs to bccomp() could lead to an out-of-bounds write with stack and heap corruption in PHP versions from 8.4.* before 8.4.24 and from 8.5.* before 8.5.9.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/AU:N
Affected products
PHP Group · PHP
⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
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