CVE-2019-9658

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

5.3 MediumFix available

Checkstyle before 8.18 loads external DTDs by default.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: Low
Integrity: None
Availability: None

Exploit likelihood

3.58%Up 0.5 points since Apr 14, 2021

What each source reports

NVD Score used 5.3

Checkstyle before 8.18 loads external DTDs by default.

Record: CVE-2019-9658
CVSS 3.0: 5.3 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
CVSS 2.0: 5.0 MediumAV:N/AC:L/Au:N/C:P/I:N/A:N
Weakness: CWE-611
Updated: 2026-11-02

CVE List No score

Checkstyle before 8.18 loads external DTDs by default.

Record: CVE-2019-9658
Updated: 2026-11-02

EUVDEUVD-2019-0381 No score

Checkstyle before 8.18 loads external DTDs by default.

Record: EUVD-2019-0381
Updated: 2026-11-03

GitHub AdvisoriesGHSA-gp32-7h29-rpxm 5.3

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

Checkstyle prior to 8.18 loads external DTDs by default, which can potentially lead to denial of service attacks or the leaking of confidential information.

Record: GHSA-gp32-7h29-rpxm
CVSS 3.0: 5.3 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Weakness: CWE-611
Updated: 2026-11-02

OSV 5.3

Checkstyle before 8.18 loads external DTDs by default.

Record: CVE-2019-9658
CVSS 3.0: 5.3 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Updated: 2026-11-02

OSVDEBIAN-CVE-2019-9658 5.3

Checkstyle before 8.18 loads external DTDs by default.

Record: DEBIAN-CVE-2019-9658
CVSS 3.0: 5.3 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Updated: 2026-11-02

OSVGHSA-gp32-7h29-rpxm 5.3

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

Checkstyle prior to 8.18 loads external DTDs by default, which can potentially lead to denial of service attacks or the leaking of confidential information.

Record: GHSA-gp32-7h29-rpxm
CVSS 3.0: 5.3 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Weakness: CWE-611
Updated: 2026-11-02

OSVUBUNTU-CVE-2019-9658 5.3

Checkstyle before 8.18 loads external DTDs by default.

Record: UBUNTU-CVE-2019-9658
CVSS 3.0: 5.3 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Updated: 2026-11-02

Affected products

Affected packages

Affected packages
Package	Affected	Fixed
`com.puppycrawl.tools:checkstyle` Maven	before 8.18	8.18
`checkstyle` Debian:12	before 8.26-1	8.26-1
`checkstyle` Debian:13	before 8.26-1	8.26-1
`checkstyle` Debian:14	before 8.26-1	8.26-1
`checkstyle` Debian:8	before 5.9-1+deb8u1, plus listed versions 5.9-1	5.9-1+deb8u1
`com.puppycrawl.tools:checkstyle` Maven	before 8.18, plus listed versions 5.25.35.45.55.6 Show 45 moreShow less 5.75.85.96.06.16.1.16.106.10.16.116.11.16.11.26.126.12.16.136.146.14.16.156.166.16.16.176.186.196.26.36.46.4.16.56.66.76.86.8.16.8.26.97.07.17.1.17.1.27.27.37.47.57.5.17.67.6.17.7	8.18
`checkstyle` Ubuntu:16.04:LTS	All versions, plus listed versions 5.9-16.12.1-16.13-16.14.1-16.15-1	None known
`checkstyle` Ubuntu:18.04:LTS	All versions, plus listed versions 6.15-17.5.1-28.8-1	None known

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2019-9658 is a medium vulnerability (CVSS 5.3) in Checkstyle, published March 11, 2019. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 3.58%, the 89th percentile. Fixed in com.puppycrawl.tools:checkstyle 8.18.

References

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This page doesn't list everything

Left out here: 22 versions. The JSON record has them.