CVE-2026-53914

Unsafe Deserialization in Kotlin Build Cache Enables Code Execution

Published Jun 26, 2026 CVSS 3.1 · 6.7 Medium EPSS < 1% KEV · Not listed
Description
In JetBrains Kotlin before 2.4.20 code execution was possible via unsafe deserialization in the build cache metadata

Remediation

No solution or workaround provided in the CVE record

Tracking

Sign in to view the affected projects.

Advisories

Source ID Title
Github GHSA Github GHSA GHSA-r937-wjx7-w2jp JetBrains Kotlin: Unsafe Deserialization in Kotlin Build Cache Enables Code Execution
History
Type Values Removed Values Added
First Time appeared Jetbrains
Jetbrains kotlin
Vendors & Products Jetbrains
Jetbrains kotlin
Type Values Removed Values Added
Title Unsafe Deserialization in Kotlin Build Cache Enables Code Execution
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description In JetBrains Kotlin before 2.4.20 code execution was possible via unsafe deserialization in the build cache metadata
Weaknesses CWE-502
References
Metrics cvssV3_1

{'score': 6.7, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:L/A:L'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
JetBrains
Published
Updated
Jun 27, 2026, 3:55 AM
Reserved
Jun 11, 2026, 1:00 PM
Status
Analyzed
Published
Jun 26, 2026, 2:17 PM
Modified
Oct 25, 2026, 10:10 PM