01 Record

CVE-2026-7263

DoS attack via DOMNode::C14N()

MediumPUBLISHEDCNA: php

CNA base score6.3 CVSS v4.0CVSS: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

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02 Description

DoS attack via DOMNode::C14N()

03 Exploitation and scoring

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.35% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 28.7% of scored records. A rank, not a probability.

NVD base score

6.3 (CVSS v4.0), scored by the NVD independently of the CNA.

NVD CVSS vector

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:Y/R:X/V:X/RE:M/U:Amber

NVD analysis status

Modified. NVD last modified this record on 2026-07-24.

Red Hat severity

Important. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published

2026-05-10 04:43Z5 MO AGO

Last updated

2026-07-15 00:40Z3 MO AGO

Reserved

2026-04-28

Assigning CNA

php

Record state

PUBLISHED

Severity

Medium (CVSS 6.3)

CNA CVSS vector

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

Weaknesses

CWE-404Improper Resource Shutdown or ReleaseClass
CWE-835Loop with Unreachable Exit Condition ('Infinite Loop')Base

Data version

5.2

Document digest

223eff39d487646407653da89dfb4094418b4cd583ebcffb17de0b12cfd121a5

05 Affected products

VendorProductVersionsPlatforms

PHP GroupPHP8.4.* to < 8.4.21, 8.5.* to < 8.5.6—

06 References

github.comhttps://github.com/php/php-src/security/advisories/GHSA-4jhr-8w89-j733vendor-advisory
access.redhat.comhttps://access.redhat.com/security/cve/CVE-2026-7263vdb-entryx_refsource_REDHAT
bugzilla.redhat.comRHBZ#2468572https://bugzilla.redhat.com/show_bug.cgi?id=2468572issue-trackingx_refsource_REDHAT
security.access.redhat.comhttps://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-7263.jsonx_sadp-csaf-vex
access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:22649vendor-advisoryx_refsource_REDHAT

07 Fixed in

AlmaLinux 10

php8.4
Fixed in 8.4.21-1.el10_2
php8.4-bcmath
Fixed in 8.4.21-1.el10_2
php8.4-cli
Fixed in 8.4.21-1.el10_2
php8.4-common
Fixed in 8.4.21-1.el10_2
php8.4-dba
Fixed in 8.4.21-1.el10_2
php8.4-dbg
Fixed in 8.4.21-1.el10_2
php8.4-devel
Fixed in 8.4.21-1.el10_2
php8.4-embedded
Fixed in 8.4.21-1.el10_2
php8.4-enchant
Fixed in 8.4.21-1.el10_2
php8.4-ffi
Fixed in 8.4.21-1.el10_2
php8.4-fpm
Fixed in 8.4.21-1.el10_2
php8.4-gd
Fixed in 8.4.21-1.el10_2
php8.4-gmp
Fixed in 8.4.21-1.el10_2
php8.4-intl
Fixed in 8.4.21-1.el10_2
php8.4-ldap
Fixed in 8.4.21-1.el10_2
php8.4-mbstring
Fixed in 8.4.21-1.el10_2
php8.4-mysqlnd
Fixed in 8.4.21-1.el10_2
php8.4-odbc
Fixed in 8.4.21-1.el10_2
php8.4-opcache
Fixed in 8.4.21-1.el10_2
php8.4-pdo
Fixed in 8.4.21-1.el10_2
php8.4-pgsql
Fixed in 8.4.21-1.el10_2
php8.4-process
Fixed in 8.4.21-1.el10_2
php8.4-snmp
Fixed in 8.4.21-1.el10_2
php8.4-soap
Fixed in 8.4.21-1.el10_2
php8.4-xml
Fixed in 8.4.21-1.el10_2

CloudLinux 10

php8.4
Fixed in 8.4.21-1.el10_2
php8.4-bcmath
Fixed in 8.4.21-1.el10_2
php8.4-cli
Fixed in 8.4.21-1.el10_2
php8.4-common
Fixed in 8.4.21-1.el10_2
php8.4-dba
Fixed in 8.4.21-1.el10_2
php8.4-dbg
Fixed in 8.4.21-1.el10_2
php8.4-devel
Fixed in 8.4.21-1.el10_2
php8.4-embedded
Fixed in 8.4.21-1.el10_2
php8.4-enchant
Fixed in 8.4.21-1.el10_2
php8.4-ffi
Fixed in 8.4.21-1.el10_2
php8.4-fpm
Fixed in 8.4.21-1.el10_2
php8.4-gd
Fixed in 8.4.21-1.el10_2
php8.4-gmp
Fixed in 8.4.21-1.el10_2
php8.4-intl
Fixed in 8.4.21-1.el10_2
php8.4-ldap
Fixed in 8.4.21-1.el10_2
php8.4-mbstring
Fixed in 8.4.21-1.el10_2
php8.4-mysqlnd
Fixed in 8.4.21-1.el10_2
php8.4-odbc
Fixed in 8.4.21-1.el10_2
php8.4-opcache
Fixed in 8.4.21-1.el10_2
php8.4-pdo
Fixed in 8.4.21-1.el10_2
php8.4-pgsql
Fixed in 8.4.21-1.el10_2
php8.4-process
Fixed in 8.4.21-1.el10_2
php8.4-snmp
Fixed in 8.4.21-1.el10_2
php8.4-soap
Fixed in 8.4.21-1.el10_2
php8.4-xml
Fixed in 8.4.21-1.el10_2

Derived from AlmaLinux 10. Partial coverage: only packages taken from AlmaLinux 10 are listed.

Debian 13

php8.4
Fixed in 8.4.21-1~deb13u1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 14

php8.4
Fixed in 8.4.21-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 26.04 LTS

php8.5
Fixed in 8.5.4-0ubuntu1.1

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.