Resource exhaustion in Darylldoyle Svg-Sanitizer
CVE-2026-107381
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.
Published .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
- Darylldoyle Svg-Sanitizer — versions < 1.0.0
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-107381?
- CVE-2026-107381 is a medium-severity vulnerability in Darylldoyle Svg-Sanitizer, classified under Improper Handling of Case Sensitivity. CVSS score: 6.5/10. Published 2026-10-14.
- How severe is CVE-2026-107381?
- Medium severity. CVSS v3 base score is 6.5 out of 10.