# RubyGems Regular Expression Denial of Service vulnerability

Advisory record · `GHSA-9j7m-rjqx-48vh`

- **Identifiers:** `GHSA-9j7m-rjqx-48vh` · `CVE-2013-4287`
- **State:** Confirmed
- **Severity:** No CVSS score
- **Critical:** No
- **Weakness (CWE):** [CWE-400](https://cwe.mitre.org/data/definitions/400.html)
- **Tags:** [Denial of service](https://agentprime.io/advisories/tag/dos.md)
- **Published:** 14 May 2022
- **Updated:** 29 Nov 2024
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 14 May 2022, 01:08 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `rubygems-update` (RubyGems): affected `<1.8.23.1 || >=1.8.24, <1.8.26 || >=2.0.0, <2.0.8 || >=2.1.0.rc.1, <2.1.0`; fixed in `1.8.23.1`, `1.8.26`, `2.0.8`, `2.1.0`

## 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:** 0.033, the 88th percentile, on 8 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

This record came from the full history of the GitHub Advisory Database, published 14 May 2022. New records show when each source confirmed them.

## Sources

- [GitHub Advisory Database: GHSA-9j7m-rjqx-48vh](https://github.com/advisories/GHSA-9j7m-rjqx-48vh)
- [OSV: GHSA-9j7m-rjqx-48vh](https://osv.dev/vulnerability/GHSA-9j7m-rjqx-48vh)
- <https://nvd.nist.gov/vuln/detail/CVE-2013-4287>
- <https://github.com/rubygems/rubygems/commit/938a7e31ac73655845ab9045629ff3f580a125da>
- <https://github.com/rubygems/rubygems/commit/b697536f2455e8c8853cf5cf8a1017a36031ed67>
- <https://github.com/rubygems/rubygems/commit/b9baec03145aed684d1cd3c87dcac3cc06becd9b>
- <https://github.com/rubygems/rubygems/commit/ed733bc379d75620f5be4213f89d1d7b38be3191>
- <https://github.com/rubygems/rubygems/blob/03a074e8838683f45611b119fd8f363aa44fe2fd/CHANGELOG.md>
- <https://github.com/rubysec/ruby-advisory-db/blob/master/gems/rubygems-update/CVE-2013-4287.yml>
- <https://web.archive.org/web/20160806152839/https://puppet.com/security/cve/cve-2013-4287>
- <http://blog.rubygems.org/2013/09/09/CVE-2013-4287.html>
- <http://rhn.redhat.com/errata/RHSA-2013-1427.html>
- <http://rhn.redhat.com/errata/RHSA-2013-1441.html>
- <http://rhn.redhat.com/errata/RHSA-2013-1523.html>

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-9j7m-rjqx-48vh>, 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-9j7m-rjqx-48vh/>. Everything for agents: <https://agentprime.io/llms.txt>.