arrow-kt Arrow before 0.9.0 resolved Gradle build artifacts (for compiling and building the published JARs) over HTTP instead of HTTPS. Any of these dependent artifacts could have been maliciously compromised by an MITM attack.
https://github.com/arrow-kt/arrow/releases/tag/0.9.0
https://github.com/arrow-kt/arrow/commit/74198dab522393487d5344f194dc21208ab71ae8
https://github.com/arrow-kt/ank/pull/36
https://github.com/arrow-kt/arrow/issues/1310
https://github.com/arrow-kt/ank/issues/35
Source: Mitre, NVD
Published: 2019-04-22
Updated: 2026-06-17
Base Score: 4.3
Vector: CVSS2#AV:N/AC:M/Au:N/C:P/I:N/A:N
Severity: Medium
Base Score: 5.9
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
EPSS: 0.00319