What is CVE-2026-53914?

CVE-2026-53914 is a medium-severity vulnerability in Jetbrains Kotlin, classified under Deserialization of Untrusted Data. CVSS score: 6.7/10. Published 2026-06-26.

How severe is CVE-2026-53914?

Medium severity. CVSS v3 base score is 6.7 out of 10.

Deserialization in Jetbrains Kotlin

CVE-2026-53914

In JetBrains Kotlin before 2.4.20 code execution was possible via unsafe deserialization in the build cache metadata

Vulnerability class: Insecure Deserialization

EPSS: 0.002 (9.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.7 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:L/A:L.

Affected products

Jetbrains Kotlin — versions 0

Weakness classification (CWE)

CWE-502 — Deserialization of Untrusted Data

References

cve@jetbrains.com (Vendor Advisory)

Frequently asked questions

What is CVE-2026-53914?: CVE-2026-53914 is a medium-severity vulnerability in Jetbrains Kotlin, classified under Deserialization of Untrusted Data. CVSS score: 6.7/10. Published 2026-06-26.
How severe is CVE-2026-53914?: Medium severity. CVSS v3 base score is 6.7 out of 10.