Medium 6.5Published Oct 14, 2026

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

Updated under an hour ago (Oct 28, 2026, 8:40 AM ET)

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Every CVE for darylldoyle svg-sanitizer

Exploited in the last 30 days

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 (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Weakness (CWE): CWE-178, CWE-400
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Awaiting Analysis
Record last updated: Oct 18, 2026
First seen by InfoSec Signals: Oct 14, 2026

Affected products

Affected products

darylldoyle svg-sanitizer darylldoyle:svg_sanitizer (from the name)	before 1.0.0	CNA record

References

References

https://github.com/darylldoyle/svg-sanitizer/security/advisories/GHSA-m9xh-6747-9r6f	x-refsource-confirm
https://github.com/darylldoyle/svg-sanitizer/commit/2dff6628314de8519155b7feb218bbe132785757	x-refsource-misc
https://github.com/darylldoyle/svg-sanitizer/releases/tag/1.0.0	x-refsource-misc

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.