How severe is CVE-2025-14178?

CVE-2025-14178 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability high.

Is CVE-2025-14178 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (34th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-14178?

CVE-2025-14178 affects Php. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-14178?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-14178 have an EU (EUVD) identifier?

Yes. CVE-2025-14178 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-205485.

When was CVE-2025-14178 published?

CVE-2025-14178 was published on 2025-12-27 and last updated on 2026-06-17.

CVE-2025-14178

CVE-2025-14178 is a medium-severity vulnerability in Php with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-190.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
EPSS exploit prediction: 0% (34th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-205485
Weakness: CWE-190
Affected product: Php
Published: 2025-12-27
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2025-14178?: 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.
How severe is CVE-2025-14178?: CVE-2025-14178 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability high.
Is CVE-2025-14178 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (34th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-14178?: CVE-2025-14178 affects Php. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-14178?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-14178 have an EU (EUVD) identifier?: Yes. CVE-2025-14178 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-205485.
When was CVE-2025-14178 published?: CVE-2025-14178 was published on 2025-12-27 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:php:php:*:*:*:*:*:*:*:*

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Other CWE-190 (Integer Overflow or Wraparound) vulnerabilities

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CVE-2015-5108 — Critical (CVSS 10.0): Integer overflow in Adobe Reader and Acrobat 10.x before 10.1.15 and 11.x before 11.0.12, Acrobat and Acrobat Reader DC…
CVE-2015-5097 — Critical (CVSS 10.0): Integer overflow in Adobe Reader and Acrobat 10.x before 10.1.15 and 11.x before 11.0.12, Acrobat and Acrobat Reader DC…
CVE-2013-2555 — Critical (CVSS 10.0): Integer overflow in Adobe Flash Player before 10.3.183.75 and 11.x before 11.7.700.169 on Windows and Mac OS X, before…

Browse all CWE-190 (Integer Overflow or Wraparound) vulnerabilities →

Threat intelligence

Threat-intel indicators referencing this CVE:

117.53.44.117 (ipv4-addr)
41.205.23.59 (ipv4-addr)
146.190.83.66 (ipv4-addr)
152.89.64.17 (ipv4-addr)
45.61.173.86 (ipv4-addr)
82.39.35.211 (ipv4-addr)
45.177.210.193 (ipv4-addr)
39.164.91.67 (ipv4-addr)