CVE-2026-53914
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Unsafe Deserialization in JetBrains Kotlin Build Cache

Publication date: 2026-06-26

Last updated on: 2026-06-26

Assigner: JetBrains s.r.o.

Description
In JetBrains Kotlin before 2.4.20 code execution was possible via unsafe deserialization in the build cache metadata
CVSS Scores
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Meta Information
Published
2026-06-26
Last Modified
2026-06-26
Generated
2026-06-26
AI Q&A
2026-06-26
EPSS Evaluated
N/A
NVD
CVE-2026-53914
EUVD
EUVD-2026-39659
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
jetbrains kotlin to 2.4.20 (exc)
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Exploitability
CWE
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KEV
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CWE ID Description
CWE-502 The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.
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Executive Summary

This vulnerability exists in JetBrains Kotlin versions before 2.4.20 and involves unsafe deserialization in the build cache metadata.

Unsafe deserialization means that maliciously crafted data can be deserialized in a way that allows execution of arbitrary code.

Impact Analysis

The vulnerability can lead to code execution, which means an attacker could potentially run malicious code on the affected system.

According to the CVSS score of 6.7, the attack requires local access with high privileges and no user interaction, but can result in high confidentiality impact, low integrity impact, and low availability impact.

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