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High 8.2 CVSS 3.1 PHP Published on 2025-12-27

In PHP versions:8.1. before 8.1.34, 8.2.

CVECVE-2025-14178 GHSANo GHSA advisory
View at the source View JSON Last modified at the source: 2026-10-13

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.

Original text by NVD (NIST), public domain.

CVSS metrics 3.1

Source: security@php.net · secondary
High 8.2
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
Attack vectorNetwork
ComplexityHigh
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityNone
IntegrityLow
AvailabilityHigh

References

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Does your server run PHP 8.1.x ≥ 8.1.0 < 8.1.34, 8.2.x ≥ 8.2.0 < 8.2.30, 8.3.x ≥ 8.3.0 < 8.3.29, 8.4.x ≥ 8.4.0 < 8.4.16, 8.5.x ≥ 8.5.0 < 8.5.1?

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