# Nokogiri vulnerable to libxml XML Entity Expansion

Advisory record · `GHSA-q7wx-62r7-j2x7`

- **Identifiers:** `GHSA-q7wx-62r7-j2x7` · `CVE-2015-1819`
- **State:** Confirmed
- **Severity:** No CVSS score
- **Critical:** No
- **Weakness (CWE):** [CWE-776](https://cwe.mitre.org/data/definitions/776.html)
- **Tags:** [Denial of service](https://agentprime.io/advisories/tag/dos.md)
- **Published:** 8 Aug 2018
- **Updated:** 29 Nov 2024
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 8 Aug 2018, 22:31 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `nokogiri` (RubyGems): affected `>=1.6.6.0, <1.6.6.4`; fixed in `1.6.6.4`

## 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:** 0.063, the 93rd percentile, on 10 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 8 Aug 2018. New records show when each source confirmed them.

## Sources

- [GitHub Advisory Database: GHSA-q7wx-62r7-j2x7](https://github.com/advisories/GHSA-q7wx-62r7-j2x7)
- [OSV: GHSA-q7wx-62r7-j2x7](https://osv.dev/vulnerability/GHSA-q7wx-62r7-j2x7)
- <https://nvd.nist.gov/vuln/detail/CVE-2015-1819>
- <https://github.com/sparklemotion/nokogiri/issues/1374>
- <https://git.gnome.org/browse/libxml2/commit/?id=213f1fe0d76d30eaed6e5853057defc43e6df2c9>
- <https://github.com/rubysec/ruby-advisory-db/blob/master/gems/nokogiri/CVE-2015-1819.yml>
- <https://security.gentoo.org/glsa/201507-08>
- <https://security.gentoo.org/glsa/201701-37>
- <https://support.apple.com/HT206166>
- <https://support.apple.com/HT206167>
- <https://support.apple.com/HT206168>
- <https://support.apple.com/HT206169>
- <http://lists.apple.com/archives/security-announce/2016/Mar/msg00000.html>
- <http://lists.apple.com/archives/security-announce/2016/Mar/msg00001.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-q7wx-62r7-j2x7>, 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-q7wx-62r7-j2x7/>. Everything for agents: <https://agentprime.io/llms.txt>.