# Moderate severity vulnerability that affects com.puppycrawl.tools:checkstyle

Advisory record · `GHSA-gp32-7h29-rpxm`

- **Identifiers:** `GHSA-gp32-7h29-rpxm` · `CVE-2019-9658`
- **State:** Confirmed
- **Severity:** CVSS 5.3 Medium
- **Critical:** No
- **Weakness (CWE):** [CWE-611](https://cwe.mitre.org/data/definitions/611.html)
- **Tags:** [XML external entities (XXE)](https://agentprime.io/advisories/tag/xxe.md)
- **Published:** 14 Mar 2019
- **Updated:** 14 Mar 2024
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 14 Mar 2019, 15:39 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `com.puppycrawl.tools:checkstyle` (Maven): affected `<8.18`; fixed in `8.18`

## Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

> Checkstyle versions before 8.18 load external DTDs by default. An attacker who can supply XML that Checkstyle parses could cause a denial of service or leak confidential information. Upgrade to Checkstyle 8.18 or later.

Written 8 Nov 2026.

## 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

- 5.3 Medium, CVSS 3.0: `CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N`, from GitHub Advisory Database

- **CISA KEV:** Not listed.
- **EPSS:** 0.036, the 89th percentile, on 12 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

- 31 Oct 2026, 15:13 UTC: First seen by agentprime
- 31 Oct 2026, 15:13 UTC: [Confirmed by OSV](https://osv.dev/vulnerability/GHSA-gp32-7h29-rpxm)

## Sources

- [GitHub Advisory Database: GHSA-gp32-7h29-rpxm](https://github.com/advisories/GHSA-gp32-7h29-rpxm)
- [OSV: GHSA-gp32-7h29-rpxm](https://osv.dev/vulnerability/GHSA-gp32-7h29-rpxm)
- <https://nvd.nist.gov/vuln/detail/CVE-2019-9658>
- <https://github.com/checkstyle/checkstyle/issues/6474>
- <https://github.com/checkstyle/checkstyle/issues/6478>
- <https://github.com/checkstyle/checkstyle/pull/6476>
- <https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VJPT54USMGWT3Y6XVXLDEHKRUY2EI4OE>
- <https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/AEYBAHYAV37WHMOXZYM2ZWF46FHON6YC>
- <https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/2BMOPJ2XYE4LB2HM7OMSUBBIYEDUTLWE>
- <https://lists.debian.org/debian-lts-announce/2019/04/msg00029.html>
- <https://lists.apache.org/thread.html/rda99599896c3667f2cc9e9d34c7b6ef5d2bbed1f4801e1d75a2b0679@%3Ccommits.nifi.apache.org%3E>
- <https://lists.apache.org/thread.html/fff26ee7b59360a0264fef4e8ed9454ef652db2c39f2892a9ea1c9cb@%3Cnotifications.fluo.apache.org%3E>
- <https://lists.apache.org/thread.html/a35a8ccb316d4c2340710f610cba8058e87d5376259b35ef3ed2bf89@%3Cnotifications.accumulo.apache.org%3E>
- <https://lists.apache.org/thread.html/994221405e940e148adcfd9cb24ffc6700bed70c7820c55a22559d26@%3Cnotifications.fluo.apache.org%3E>

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-gp32-7h29-rpxm>, 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-gp32-7h29-rpxm/>. Everything for agents: <https://agentprime.io/llms.txt>.