Kotlin ↗

JetBrains · Language / Runtime

Track your version:Monitors Kotlin and tailors your dashboard to that exact version.

2.4.0 · latest cycle100/100 Healthy

Summary iPlain-English security verdict for Kotlin, generated from its current health score, actively-exploited vulnerabilities, and latest supported version.

Kotlin currently scores 100/100 — healthy. No tracked vulnerabilities are currently known to be exploited in the wild. The latest supported release is 2.4.0. It's on the latest patch with no significant known issues — keep it current.

Disclosure trend iNew CVEs published for Kotlin each year (NVD). A higher bar means more disclosures that year — more scrutiny, not necessarily less safe.

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Patch priority — what to act on iThe issues to fix first — actively exploited (CISA KEV) first, then by exploitation probability (EPSS), then severity. Each row's "→ fixed in" is the earliest version that patches it; "see advisory" means no fixed version is published.

No urgent unpatched issues identified. ✓

See all 6 known Kotlin CVEs & security history →

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Versions & lifecycle iWhen each release line stops receiving security patches (end-of-life). After EOL there are no more fixes — plan upgrades before these dates.

How long each Kotlin release line is supported — and when it sunsets. Select a line for its full report.

Jun3'26 Kotlin 2.3ended 2026-06-03

Dec16'25 Kotlin 2.2ended 2025-12-16

Jun23'25 Kotlin 2.1ended 2025-06-23

Nov27'24 Kotlin 2.0ended 2024-11-27

May21'24 Kotlin 1.9ended 2024-05-21

Jul6'23 Kotlin 1.8ended 2023-07-06

Dec28'22 Kotlin 1.7ended 2022-12-28

Jun9'22 Kotlin 1.6ended 2022-06-09

Nov29'21 Kotlin 1.5ended 2021-11-29

Apr26'21 Kotlin 1.4ended 2021-04-26

Aug14'20 Kotlin 1.3ended 2020-08-14

Full Kotlin end-of-life dates & support timeline →

Frequently asked

Is Kotlin safe and patched?

What should I do about Kotlin now?

Upgrade Kotlin to the latest supported release (2.4.0) or later and apply available security updates, then confirm against JetBrains's official advisory.

When does Kotlin reach end-of-life?

The latest supported Kotlin release is 2.4.0. After end-of-life a release no longer receives security patches.

Which versions of Kotlin are still receiving security updates?

Supported Kotlin release lines (latest 2.4.0): 2.4. End-of-life releases no longer receive security patches.

Informational only, from public data (NVD · CISA KEV · EPSS · endoflife.date), and can lag or miss vendor-specific fixes. Always confirm against JetBrains's official advisory before you patch or upgrade — Kotlin official site ↗