What is CVE-2026-53914?
In JetBrains Kotlin before 2.4.20 code execution was possible via unsafe deserialization in the build cache metadata
The record classifies CVE-2026-53914 under weakness class CWE-502. Its CVSS v3 base vector states that the flaw requires local access to the host, needs high-privilege credentials, needs no user interaction, and has high impact on confidentiality. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 101 days ago.
Severity and exploitation probability
- CVSS v3.1 base score
- 6.7 — MEDIUM
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:L/A:L - EPSS (FIRST)
- 0.1% probability of exploitation in the next 30 days, higher than 9.4% of all scored CVEs
- CISA KEV
- Not listed in the CISA Known Exploited Vulnerabilities catalog
- Threadlinqs priority
- 3.7/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- Published
- 2026-06-26, last modified 2026-06-27
Is CVE-2026-53914 being exploited?
No public exploitation evidence for CVE-2026-53914 is recorded in the sources Threadlinqs tracks — CISA KEV, Exploit-DB, public proof-of-concept repositories and ProjectDiscovery Nuclei — as of 2026-06-27. That is an absence of evidence in those feeds, not a guarantee that the vulnerability is unexploited.
Affected products and versions
- JetBrains: Kotlin
How to fix CVE-2026-53914
No vendor patch reference has been recorded for CVE-2026-53914 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.
Threat activity tracking CVE-2026-53914
1 tracked threat in the Threadlinqs corpus references CVE-2026-53914, either in the campaign’s CVE list or as an indicator on the campaign record.
Sources
Enriched from CVE.org, FIRST EPSS, GitHub Security Advisories. Last verified by Threadlinqs on .