svg-sanitizer is a PHP SVG/XML sanitizer. Prior to 1.0.0, Resolver::processReferences() in src/ElementReference/Resolver.php builds the SVG <use> reference graph with a case-sensitive href attribute predicate before cleanHrefAttributes() normalizes mixed-case names. An attacker can provide xlink:HrEf on nested <use> elements so the graph omits those references, after which the sanitizer converts the attribute to canonical xlink:href and returns the live nesting structure without applying the useNestingLimit protection. A consuming application that renders the sanitized SVG can therefore be exposed to the resource exhaustion that control is designed to prevent. This issue is fixed in version 1.0.0.
History

Sun, 18 Oct 2026 14:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Sat, 17 Oct 2026 06:30:00 +0000

Type Values Removed Values Added
First Time appeared Darylldoyle
Darylldoyle svg-sanitizer
Vendors & Products Darylldoyle
Darylldoyle svg-sanitizer

Wed, 14 Oct 2026 15:00:00 +0000

Type Values Removed Values Added
Description svg-sanitizer is a PHP SVG/XML sanitizer. Prior to 1.0.0, Resolver::processReferences() in src/ElementReference/Resolver.php builds the SVG <use> reference graph with a case-sensitive href attribute predicate before cleanHrefAttributes() normalizes mixed-case names. An attacker can provide xlink:HrEf on nested <use> elements so the graph omits those references, after which the sanitizer converts the attribute to canonical xlink:href and returns the live nesting structure without applying the useNestingLimit protection. A consuming application that renders the sanitized SVG can therefore be exposed to the resource exhaustion that control is designed to prevent. This issue is fixed in version 1.0.0.
Title svg-sanitizer: Mixed-case xlink:HrEf skips the `<use>` nesting-DoS check in Resolver::processReferences
Weaknesses CWE-178
CWE-400
References
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2026-10-14T14:53:40.415Z

Updated: 2026-10-18T13:36:27.865Z

Reserved: 2026-10-07T21:07:54.988Z

Link: CVE-2026-107381

cve-icon Vulnrichment

Updated: 2026-10-18T13:36:23.463Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-10-14T15:17:06.327

Modified: 2026-10-18T14:16:54.040

Link: CVE-2026-107381

cve-icon Redhat

No data.