CVE-2026-7263
HIGH severity · CVSS 7.5 · CWE-404
7.5CVSS HIGH
Summary
In PHP versions 8.4.* before 8.4.21 and 8.5.* before 8.5.6, DOMNode::C14N() method may process the XML data incorrectly, causing a circular linked list in the data structure representing the XML document. This may cause subsequent processing of the XML document to enter infinite loop, causing denial of service in the processing application.
Impact & exploitability
Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
Confidentiality impactNone
Integrity impactNone
Availability impactHigh
Exploit probability (EPSS)0%
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected products we track (1)
Recommendation
Apply the vendor fix promptly. Open any affected product above for its exact safe version.
Additional information
- NVD record
- https://github.com/php/php-src/security/advisories/GHSA-4jhr-8w89-j733Advisory
- https://access.redhat.com/errata/RHSA-2026:22649
- https://access.redhat.com/security/cve/CVE-2026-7263
- https://bugzilla.redhat.com/show_bug.cgi?id=2468572
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-7263.json