Description
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.
Affected products
php: php
References2
- github.com/php/php-src/security/advisories/GHSA-cj93-vc83-wgqv Vendor Advisory
- github.com/php/php-src/security/advisories/GHSA-cj93-vc83-wgqv Vendor Advisory
Metrics
- CVSS 3.1
-
6.5
MEDIUM
Score source: CNA
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H - EPSS — exploit probability
- 0% percentile: 24 · as of 9 November 2026
- CWE
- CWE-190
Could this be exploited in your environment?
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