# Commonmarker vulnerable to to several quadratic complexity bugs that may lead to denial of service

Advisory record · `GHSA-48wp-p9qv-4j64`

- **Identifiers:** `GHSA-48wp-p9qv-4j64`
- **State:** Confirmed
- **Severity:** No CVSS score
- **Critical:** No
- **Published:** 11 Apr 2023
- **Updated:** 4 Dec 2024
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 11 Apr 2023, 22:08 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `commonmarker` (RubyGems): affected `<0.23.9`; fixed in `0.23.9`

## Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

## Severity and exploitation

No source has published a CVSS score for this record yet.

- **CISA KEV:** Not listed.
- **EPSS:** No score.

## Timeline

This record came from the full history of the GitHub Advisory Database, published 11 Apr 2023. New records show when each source confirmed them.

## Sources

- [GitHub Advisory Database: GHSA-48wp-p9qv-4j64](https://github.com/advisories/GHSA-48wp-p9qv-4j64)
- [OSV: GHSA-48wp-p9qv-4j64](https://osv.dev/vulnerability/GHSA-48wp-p9qv-4j64)
- <https://github.com/github/cmark-gfm/security/advisories/GHSA-66g8-4hjf-77xh>
- <https://github.com/github/cmark-gfm/security/advisories/GHSA-r8vr-c48j-fcc5>
- <https://github.com/gjtorikian/commonmarker/security/advisories/GHSA-48wp-p9qv-4j64>
- <https://github.com/gjtorikian/commonmarker/pull/236>
- <https://github.com/github/cmark-gfm/releases/tag/0.29.0.gfm.10>
- <https://github.com/github/cmark-gfm/releases/tag/0.29.0.gfm.11>
- <https://github.com/gjtorikian/commonmarker>
- <https://github.com/gjtorikian/commonmarker/releases/tag/v0.23.9>

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.

## Check whether this affects you

A Match means an installed version is in the affected range above. Most don’t affect the app; agentprime hasn’t analysed this one yet.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), ask your agent to check the project: `check_lockfile` sends a lockfile, `check_packages` a list of installed packages, and both return the Matches and the upgrades that clear them. `get_advisory` returns this record. Setup: <https://agentprime.io/mcp.md>
- In a browser: <https://agentprime.io/check/> reads your lockfile in the browser, never uploading it.
- Whether it touches your code, with file and line: the Claude Code plugin, <https://agentprime.io/plugin.md>
- As JSON: <https://api.agentprime.io/v1/advisories/GHSA-48wp-p9qv-4j64>, or `POST https://api.agentprime.io/v1/match` with your packages (<https://agentprime.io/api.md>)

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The web page: <https://agentprime.io/advisories/GHSA-48wp-p9qv-4j64/>. Everything for agents: <https://agentprime.io/llms.txt>.