High severity vulnerability that affects com.github.shyiko.ktlint:ktlint-core

published 2019-04-02 7 y ago modified 2026-06-17 4 mo ago also GHSA-r8h9-hq9c-2p5c , EUVD-2019-0433

cvss: 8.1; version 3.0, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 1.5%; EPSS 1.5% chance of exploitation in 30 days, percentile 74%
public exploits: 0; none known

Using ktlint to download and execute custom rulesets can result in arbitrary code execution as the served jars can be compromised by a MITM. This attack is exploitable via Man in the Middle of the HTTP connection to the artifact servers. This vulnerability appears to have been fixed in 0.30.0 and later; after commit 5e547b287d6c260d328a2cb658dbe6b7a7ff2261.

Patch / fix

fixed in 2 links 1

maven com.github.shyiko.ktlint:ktlint-core 0.30.0
ktlint_project ktlint 0.30.0

github.com/shyiko/ktlint#332 pull request

Exploit prediction

1.48% chance of exploitation in the next 30 days, higher than 74% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

github.com https://github.com/shyiko/ktlint/pull/332 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
NVD	3.0	8.1	CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD	2.0	9.3	AV:N/AC:M/Au:N/C:C/I:C/A:C
GitHub	3.0	8.1	CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected packages

ecosystem	package	affected	fixed in
maven	com.github.shyiko.ktlint:ktlint-core	<0.30.0	0.30.0

Affected products

ktlint ktlint

Classification

Weakness

CWE-319 Cleartext Transmission of Sensitive Information

References

github.com /shyiko/ktlint/pull/332
web, exploit, patch, third-party-advisory
nvd.nist.gov /vuln/detail/CVE-2019-1010260
advisory
github.com /advisories/GHSA-r8h9-hq9c-2p5c
advisory
github.com /shyiko/ktlint
package

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary