---
id: CVE-2026-121445
title: >-
  svg-sanitizer 1.0.0 before 1.1.0 ReDoS and Fail-Open via image-set CSS
  Stripping
summary: >-
  darylldoyle svg-sanitizer from 1.0.0 before 1.1.0 contains a regular
  expression denial of service vulnerability in the image-set pattern of
  stripRemoteCssTokens() when removeRemoteReferences is enabled. Attackers can
  submit SVGs with man…
severity: medium
cvss: 5.9
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H'
cvssSource: cna
cwe:
  - CWE-754
vendor: darylldoyle
product: svg-sanitizer
affected:
  - svg-sanitizer >= 1.0.0 < 1.1.0
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-11-03T16:55:56.736749Z'
exploitAvailable: true
published: '2026-11-03'
updated: '2026-11-03'
sourceUpdated: '2026-11-03T16:56:19.864Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-121445'
references:
  - url: >-
      https://github.com/darylldoyle/svg-sanitizer/security/advisories/GHSA-94x8-pw3c-6qcq
    label: GitHub Security Advisory (GHSA-94x8-pw3c-6qcq)
  - url: >-
      https://www.vulncheck.com/advisories/svg-sanitizer-1.0.0-before-1.1.0-redos-and-fail-open-via-image-set-css-stripping
    label: >-
      VulnCheck Advisory: svg-sanitizer 1.0.0 before 1.1.0 ReDoS and Fail-Open
      via image-set CSS Stripping
tags:
  - cve.org
  - exploit-available
epss: 0.00379
epssPercentile: 0.32039
ingestedAt: '2026-11-05T20:33:06.292Z'
---

## Overview

darylldoyle svg-sanitizer from 1.0.0 before 1.1.0 contains a regular expression denial of service vulnerability in the image-set pattern of stripRemoteCssTokens() when removeRemoteReferences is enabled. Attackers can submit SVGs with many unclosed image-set tokens to exhaust CPU, or trigger PCRE limits causing sanitize() to throw a TypeError and leave unsanitized content.

## Affected

- `svg-sanitizer >= 1.0.0 < 1.1.0`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.