What’s Vulnerable › Vulnerabilities

CVE-2026-53914

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-06-26 · updated 2026-10-25
• Weakness: CWE-502

Description

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

Affected products

• JetBrains Kotlin: before 2.4.20 — fixed in 2.4.20

How to fix

Upgrade to a fixed version: JetBrains Kotlin 2.4.20. Check the vendor advisory for mitigations.

References

• https://www.jetbrains.com/privacy-security/issues-fixed/

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