Integer overflow in PHP
CVE-2025-14181
The SOAP HTTP client guards its response buffer growth with a check that relies on signed integer overflow, which is undefined behaviour and is not guaranteed to trigger. When the check is optimised away, a malicious SOAP server can make the client allocate a buffer far smaller than the data it then writes into it, producing a heap buffer overflow.
Vulnerability class: Integer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H.
EPSS exploit prediction
EPSS: 0.003 (24.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 24th percentile — 24.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: -0.000
Affected products
Weakness classification (CWE)
References
- github.com/php/php-src/security/advisories/GHSA-cj93-vc83-wgqv (vendor-advisory, Vendor Advisory)
Frequently asked questions
- What is CVE-2025-14181?
- CVE-2025-14181 is a medium-severity vulnerability in PHP, classified under Integer Overflow or Wraparound. CVSS score: 6.5/10. Published 2026-09-25.
- How severe is CVE-2025-14181?
- Medium severity. CVSS v3 base score is 6.5 out of 10.