CVE-2026-7263
Medium
Elevated severity or exploit probability.
CVSS base
7.5
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS — probability of exploitation (30 days)
0.4%
29.0th percentile
CISA KEV
Not listed
Weakness / dates
CWE-835
Published 2026-05-10 · modified 2026-07-24
CVSS breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
| Attack Vector | N | Network |
| Attack Complexity | L | Low |
| Privileges Required | N | None |
| User Interaction | N | None |
| Scope | U | Unchanged |
| Confidentiality | N | None |
| Integrity | N | None |
| Availability | H | High |
Timeline
- 2026-05-10 — Published (NVD)
- 2026-07-24 — Last modified (NVD)
Description
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.
Affected
References
- https://github.com/php/php-src/security/advisories/GHSA-4jhr-8w89-j733
- 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