🛡️ CVE-2026-53914 — kotlin

🟡 CVSS 6.7 — Medium ✅ No Known Exploit CWE-502 NVD
6.7
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

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

How this vulnerability can be exploited

This issue can be reached with local access to the system, attack complexity is high, an attacker needs administrative privileges on the target. No user interaction is required. The scope is changed, meaning a successful attack can affect components beyond the vulnerable one. Rated impact: confidentiality high, integrity low, availability low.

Weakness class

CVE-2026-53914 is classified as CWE-502: Deserialization of Untrusted Data. Serialised data from an untrusted source is reconstructed into objects, which can trigger code during the process.

Affected software

CVE-2026-53914 is recorded against 1 package.

  • kotlin (fixed in 2.4.20)

Timeline and source

Published on 26 June 2026 and last revised on 27 June 2026. No public exploit is currently recorded for this entry. Record sourced from NVD.

References

www.jetbrains.com

Details

Severity MEDIUM
CVSS Score 6.7
CVSS Vector CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:L/A:L
CWE CWE-502
Public Exploit ✅ No
Source NVD
Published 2026-06-26
Updated 2026-08-11
Modified 2026-06-27
Fix URL N/A

Affected Packages

Software From version Fixed in
kotlin — 2.4.20

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