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Vulnerabilities in the PHP language itself, and which PHP versions they affect.

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CVE-2026-17544

HIGH 8.1 CVSS 4.0
Published
July 30, 2026
Last modified
October 23, 2026
NVD status
Analyzed
Reported by
security@php.net
Weakness
CWE-787
CVSS vector
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/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:N/R:X/V:X/RE:X/U:X

Description

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.

Affected products and versions

  • PHP — From 8.4.0 (including) to 8.4.24 (excluding)
  • PHP — From 8.5.0 (including) to 8.5.9 (excluding)

References

  • github.com https://github.com/php/php-src/security/advisories/GHSA-x692-q9x7-8c3f Vendor Advisory
  • nvd.nist.gov Official NVD record