CVE-2026-121444

High

Description

svg-sanitizer from 0.11.0 before 1.1.0 contains an algorithmic complexity denial of service vulnerability in hasInfiniteLoop() and countUse() of the use reference-graph analysis. Attackers can upload a small layered SVG with 15 levels of fanned-out use elements, forcing exponential path enumeration that pins PHP workers for hours.

SeverityHigh

CVSS7.5

Exploit probability—

ProductDarylldoyle Svg-sanitizer

PublishedNov 3, 2026

First seenNov 4, 2026

Weakness typeCWE-400Uncontrolled resource consumption

How to fix

Update

darylldoyle svg-sanitizer1.1.0 or later

Vendor advisories

github.com/darylldoyle/svg-sanitizer/security/advisories/GHSA-hrwm-vcc9-hcm4

Affected products

Product	Affected versions	Fixed in
darylldoyle svg-sanitizer	0.11.0 ≤ v < 1.1.0	1.1.0

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