Kotlin vulnerabilities: known CVEs & security history
JetBrains · Language / Runtime · 6 tracked CVEs · 0 actively exploited · updated June 2026 · what is a CVE? →
This is the full list of known vulnerabilities (CVEs) across all Kotlin release lines — 6 in total. A CVE here doesn't mean your version is affected — check Kotlin's current status and the safe version to run.
Known Kotlin CVEs
Actively-exploited and most-severe first. Open any CVE for full details.
| CVE | Severity | CVSS | EPSS | Year |
|---|---|---|---|---|
| CVE-2020-15824 | high | 8.8 | 2% | 2020 |
| CVE-2019-10103 | high | 8.1 | 1% | 2019 |
| CVE-2019-10102 | high | 8.1 | 1% | 2019 |
| CVE-2019-10101 | high | 8.1 | 2% | 2019 |
| CVE-2022-24329 | medium | 5.3 | 2% | 2022 |
| CVE-2020-29582 | medium | 5.3 | 3% | 2021 |
Is my Kotlin version affected?
The list above spans every release. To know whether your version is affected — and the minimum safe version to upgrade to — check it directly.
Check your Kotlin version → · Monitor Kotlin for new CVEs →
Kotlin vulnerabilities — frequently asked
How many known vulnerabilities does Kotlin have?
IsItPatched tracks 6 CVEs for Kotlin. 0 are critical-severity and 4 high-severity. These span every release line — what matters is whether the version you run is affected.
Does Kotlin have any actively-exploited vulnerabilities?
None of Kotlin's tracked CVEs are currently in CISA's KEV catalog — but new ones can be added at any time, so keep your version current.
What is the most severe Kotlin vulnerability?
Among tracked issues, CVE-2020-15824 (HIGH, CVSS 8.8) ranks highest — a Improper privilege management weakness.
Is Kotlin safe to use?
It depends on the version. The latest supported Kotlin release (2.4.0) clears the known issues; older versions may still be affected. Check the exact version you run for a verdict.
CVE data aggregated from NVD, CISA KEV and EPSS (FIRST.org). Related: Kotlin security status · Kotlin end-of-life · actively-exploited CVEs. Always verify against JetBrains's advisories — see our disclaimer.