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TI-2026-06377 Aliases CVE-2026-7263

DoS attack via DOMNode::C14N()

Priority LOW 34CWE-404Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
Present
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · Low
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-404.

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00353 29th percentileScored 2026-11-07
Fix Fixed PHP (PHP Group): 8.4.21, 8.5.6Red Hat: 1 advisory

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
PHP GroupPHPbefore 8.4.21; before 8.5.68.4.21, 8.5.6Patch availableCNA
  • PHP VendorPHP Group Affected before 8.4.21; before 8.5.6 Fixed in 8.4.21, 8.5.6 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:php:php:*:*:*:*:*:*:*:*8.4.0 to before 8.4.21; 8.5.0 to before 8.5.6VulnerablePHP
  • cpe:2.3:a:php:php:*:*:*:*:*:*:*:* Versions 8.4.0 to before 8.4.21; 8.5.0 to before 8.5.6 Vulnerable ·PHP

Remediation

  • Fix · CNA PHP (PHP Group) Fixed in 8.4.21, 8.5.6

Red Hat 1 advisory

  • RHSA-2026:22649 Released 2026-06-02 · Red Hat rating Important
    php8.4 security update
    • Red Hat Enterprise Linux AppStream (v. 10) php8.4-8.4.21-1.el10_2, php8.4-bcmath-8.4.21-1.el10_2, php8.4-cli-8.4.21-1.el10_2 +22

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    PHP 8.4.21, 8.5.6

    2 records Highest priority Priority LOW 2 LOW

    Other records, highest priority first

    • TI-2026-05348 Global buffer over-read in mb_convert_encoding() with attacker-supplied encodingPriority LOW 34
    Show all 2 records →

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux AppStream (v. 10)Fixed RHSA-2026:22649
Not affected: 6 products
  • Red Hat Enterprise Linux 10
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 8
  • Red Hat Enterprise Linux 9
  • Red Hat Hardened Images

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-7263

References

Advisory 1

  • TI-2024-04260 Argument Injection in PHP-CGI KEVCVSS 3.1CRITICAL 9.8
  • TI-2026-78794 PHP remote code execution via stale global state KEVCVSS 4.0CRITICAL 9.2
  • TI-2026-78793 Out-of-memory handling flaw in PHP allows remote code execution KEVCVSS 4.0CRITICAL 9.2
  • TI-2024-01743 Command injection via array-ish $command parameter of proc_open() CVSS 3.1CRITICAL 9.4
  • TI-2022-13555 PDO::quote() may return unquoted string CVSS 3.1CRITICAL 9.1
  • TI-2024-10408 Reference counting in php_request_shutdown causes Use-After-Free CVSS 4.0CRITICAL 9.2
See all 107 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences