PatchTheCVECVE-2026-53914: In JetBrains Kotlin before 2.4.20 code execution was possible via unsafe deserialization in the build cache me
CVE-2026-53914 is a medium-severity flaw (CVSS 6.7) affecting kotlin. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
In JetBrains Kotlin before 2.4.20 code execution was possible via unsafe deserialization in the build cache metadata
Why this priority
- No elevated risk signals yet
A fixed release or distro patch exists.
Risk facts
| CVSS score | 6.7 (Medium) |
| Attack vector | Local |
| Attack complexity | High |
| Privileges needed | High |
| User interaction | None |
| EPSS exploit chance | 0.3% (top 74%) |
| CISA exploited list | No |
| Weakness | CWE-502 |
| Published | 2026-06-26 |
| Last modified | 2026-10-25 |
Last updated 2026-10-25 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2026-53914?
kotlin: upgrade to 2.4.20. Exact commands for each OS are on this page.
Is CVE-2026-53914 being exploited?
CVE-2026-53914 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2026-53914 affect?
CVE-2026-53914 affects kotlin. Severity is medium (CVSS 6.7). In JetBrains Kotlin before 2.4.20 code execution was possible via unsafe deserialization in the build cache metadata
How urgent is CVE-2026-53914?
Priority 30/100. No elevated risk signals yet.