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Vulnerability record · CVE-2019-10101 · published 3 July 2019

CVE-2019-10101: Jetbrains kotlin cleartext transmission vulnerability

Jetbrains · Kotlin

JetBrains Kotlin versions before 1.3.30 were resolving artifacts using an http connection during the build process, potentially allowing an MITM attack.

8.1 CVSS 3.1 High EPSS 1.4% · top 28.7% CWE-319 · Cleartext transmission
8.1CVSS 3.1 base score, v2 6.8
1.4%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
6References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

JetBrains Kotlin versions before 1.3.30 were resolving artifacts using an http connection during the build process, potentially allowing an MITM attack.

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://blog.jetbrains.com/blog/2019/06/19/jetbrains-security-bulletin-q1-2019/ Vendor Advisory
https://medium.com/bugbountywriteup/want-to-take-over-the-java-ecosystem-all-you-need-is-a-mitm-1fc329d898fb ExploitThird Party Advisory
https://security.netapp.com/advisory/ntap-20230818-0012/
https://blog.jetbrains.com/blog/2019/06/19/jetbrains-security-bulletin-q1-2019/ Vendor Advisory
https://medium.com/bugbountywriteup/want-to-take-over-the-java-ecosystem-all-you-need-is-a-mitm-1fc329d898fb ExploitThird Party Advisory
https://security.netapp.com/advisory/ntap-20230818-0012/

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2026-53914Jetbrains kotlin deserialization of untrusted data vulnerabilityIn JetBrains Kotlin before 2.4.20 code execution was possible via unsafe deserialization in the build cache metadataEPSS 0.33%8.8CVE-2020-15824Jetbrains kotlin improper privilege management vulnerabilityIn JetBrains Kotlin from 1.4-M1 to 1.4-RC (as Kotlin 1.3.7x is not affected by the issue. Fixed version is 1.4.0) there is a script-cache privilege e…EPSS 1.8%8.1CVE-2019-10102Jetbrains kotlin cleartext transmission vulnerabilityJetBrains Ktor framework (created using the Kotlin IDE template) versions before 1.1.0 were resolving artifacts using an http connection during the b…EPSS 0.82%8.1CVE-2019-10103Jetbrains kotlin missing encryption vulnerabilityJetBrains IntelliJ IDEA projects created using the Kotlin (JS Client/JVM Server) IDE Template were resolving Gradle artifacts using an http connectio…EPSS 0.81%5.3CVE-2022-24329Jetbrains kotlin inclusion from untrusted sphere vulnerabilityIn JetBrains Kotlin before 1.6.0, it was not possible to lock dependencies for Multiplatform Gradle Projects.EPSS 2.2%5.3CVE-2020-29582Jetbrains kotlin incorrect default permissions vulnerabilityIn JetBrains Kotlin before 1.4.21, a vulnerable Java API was used for temporary file and folder creation. An attacker was able to read data from such…EPSS 2.6%

Source: NIST National Vulnerability Database (record CVE-2019-10101), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.