CVE-2026-107379

MEDIUM 6.5

enshrined/svg-sanitize: Denial of Service via DTD Attribute Declaration Crash

CVSS Score

6.5

EPSS Score

0.0%

EPSS Percentile

0th

savg-sanitizer is a PHP SVG/XML sanitizer. Prior to 1.0.0, svg-sanitizer allows a crafted SVG DTD with a #FIXED attribute default to make cleanAttributesOnWhitelist() perform a double DOMElement::removeAttribute() call on the same attribute name in src/Sanitizer.php. The first removal deletes the explicit attribute, while the DTD default rematerializes the value before the href safety path performs the second removal, which can corrupt libxml state and terminate the PHP worker. An attacker who can submit SVG content to a sanitization endpoint can repeatedly interrupt workers and degrade or exhaust application availability. This issue is fixed in version 1.0.0.

CWE	CWE-770
Vendor	darylldoyle
Product	svg-sanitizer
Published	Oct 8, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Affected Versions

darylldoyle / svg-sanitizer

< 1.0.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/darylldoyle/svg-sanitizer/security/advisories/GHSA-v383-3rw5-q8rf github.com: https://github.com/darylldoyle/svg-sanitizer/commit/23877db7e76f1e1df5c3e65ab30239219c3d2867 github.com: https://github.com/darylldoyle/svg-sanitizer/releases/tag/1.0.0