Deserialization of Untrusted Data in Kotlin - CVE-2026-53914
Published: August 17, 2026
Vulnerability identifier: #VU143834
CSH Severity: Low
CVSS v4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-53914
CWE-ID: CWE-502
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to execute arbitrary code.
The vulnerability exists due to unsafe deserialization in the build cache metadata when processing serialized cache metadata. A local user can supply crafted build cache metadata to execute arbitrary code.
Affected software
Kotlin
How to mitigate CVE-2026-53914
Install security update from vendor's website.
Kotlin - update to 2.4.20