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Medium · 5.3 CVE-2026-121443 EUVD-2026-115865GHSA-8888-g577-32c9

svg-sanitizer from 1.1.0 before 1.1.1 Denial of Service via Unclosed Tag

Published Nov 3, 2026 · Updated Nov 9, 2026 · Assigned by VulnCheck

Description

svg-sanitizer from 1.1.0 before 1.1.1 contains a denial of service vulnerability that allows remote attackers to crash requests by submitting SVG input ending inside an unclosed tag. Attackers can upload truncated input like a single '<' to trigger an uncaught ValueError from strpos() in hasElementWithTooManyAttributes() or hasInternalDtdSubset() on PHP 8, failing the request.

Affected products

VendorProductAffectedFixed
darylldoyle svg-sanitizer 1.1.0 – < 1.1.1 1.1.1

References