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PHP CVEs

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

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CVE-2025-14178

HIGH 8.2 CVSS 3.1
Published
December 27, 2025
Last modified
October 13, 2026
NVD status
Modified
Reported by
security@php.net
Weakness
CWE-190, CWE-787
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H

Description

In PHP versions:8.1.* before 8.1.34, 8.2.* before 8.2.30, 8.3.* before 8.3.29, 8.4.* before 8.4.16, 8.5.* before 8.5.1, a heap buffer overflow occurs in array_merge() when the total element count of packed arrays exceeds 32-bit limits or HT_MAX_SIZE, due to an integer overflow in the precomputation of element counts using zend_hash_num_elements(). This may lead to memory corruption or crashes and affect the integrity and availability of the target server.

Affected products and versions

  • PHP — From 8.1.0 (including) to 8.1.34 (excluding)
  • PHP — From 8.2.0 (including) to 8.2.30 (excluding)
  • PHP — From 8.3.0 (including) to 8.3.29 (excluding)
  • PHP — From 8.4.0 (including) to 8.4.16 (excluding)
  • PHP — From 8.5.0 (including) to 8.5.1 (excluding)

References

  • github.com https://github.com/php/php-src/security/advisories/GHSA-h96m-rvf9-jgm2 Vendor Advisory
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2026/01/msg00019.html
  • nvd.nist.gov Official NVD record