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CVE-2026-107381

CVE-2026-107381 · svg-sanitizer: Mixed-case xlink:HrEf skips the `<use>` nesting-DoS check in Resolver::processReferences

This page contains facts from public vulnerability sources. Check the original advisory before updating.

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.

CVSS 6.5 · Medium · EPSS 0.4% · Fix available

Published
Updated

Stack: php

Affected products and versions

  • svg-sanitizer

    Versions
    • < 1.0.0: Affected

    No fix published

  • enshrined/svg-sanitize Packagist

    Versions
    • 0.1.0
    • 0.1.1
    • 0.1.2
    • 0.1.3
    • 0.1.4
    • 0.1.5
    • 0.1.6
    • 0.10.0
    • 0.11.0
    • 0.12.0
    • 0.13.0
    • 0.13.1
    • 0.13.2
    • 0.13.3
    • 0.14.0
    • 0.14.1
    • 0.15.0
    • 0.15.1
    • 0.15.2
    • 0.15.3
    • 0.15.4
    • 0.16.0
    • 0.17.0
    • 0.18.0
    • 0.19.0
    • 0.2.0
    • 0.2.1
    • 0.20.0
    • 0.21.0
    • 0.22.0
    • 0.3.0
    • 0.4.0
    • 0.4.1
    • 0.5.0
    • 0.5.1
    • 0.5.2
    • 0.5.3
    • 0.5.3.1
    • 0.6.0
    • 0.7.0
    • 0.7.1
    • 0.7.2
    • 0.8.0
    • 0.8.1
    • 0.8.2
    • 0.9.0
    • 0.9.1
    • 0.9.2
    Affected ranges
    • ECOSYSTEM: < 1.0.0

    Update to 1.0.0

Original sources

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