CVE-2026-53914

Analyzed Analyzed - Analysis Complete

Unsafe Deserialization in JetBrains Kotlin Build Cache

Publication date: 2026-06-26

Last updated on: 2026-06-27

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

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-06-26

Last Modified

2026-06-27

Generated

2026-07-16

AI Q&A

2026-06-26

EPSS Evaluated

2026-07-15

NVD

CVE-2026-53914

EUVD

EUVD-2026-39659

Affected Vendors & Products

Vendor	Product	Version / Range
jetbrains	kotlin	to 2.4.20 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-502	The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.

Attack-Flow Graph

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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