CVE-2026-7263

EUVD-2026-28981
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
phpCNA
6.3 MEDIUM
NETWORK
LOW
NONE
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:L/AU:Y/RE:M/U:Amber
Base Score
CVSS 3.x
EPSS Score
Percentile: 12%
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources.
VendorProductVersionSource
phpphp
8.4.* ≤
𝑥
< 8.4.21
CNA
phpphp
8.5.* ≤
𝑥
< 8.5.6
CNA
Debian logo
Debian Releases
Debian Product
Codename
php7.4
bullseye
7.4.33-1+deb11u5
fixed
bullseye (security)
7.4.33-1+deb11u10
fixed
php8.2
bookworm
8.2.29-1~deb12u1
fixed
bookworm (security)
8.2.31-1~deb12u1
fixed
php8.4
forky
vulnerable
sid
8.4.21-1
fixed
trixie
vulnerable
trixie (security)
8.4.21-1~deb13u1
fixed
Common Weakness Enumeration
Vulnerability Media Exposure
References
https://github.com/php/php-src/security/advisories/GHSA-4jhr-8w89-j733