Is Flink 1.18.1 patched?
Current stable (2.3.0): 100/100
1.18.1 has 1 open critical-or-high vulnerability. Run 1.20.4 or later to clear it. See what 1.20.4 fixes →
Upgrade impact: Minor upgrade. Minor releases are usually backwards-compatible, but can add or change behaviour — test in staging before production.
Summary iPlain-English security status for Flink 1.18.1, built from its CVEs, active-exploitation data, end-of-life date and latest release.
Flink 1.18.1 is part of the 1.18 release line. 1 known vulnerability affects it. The minimum safe version is 1.20.4 — upgrade to it or later to clear the open critical/high issues. The 1.18 line reached end-of-life on 2025-03-24, so it no longer receives security patches. The latest supported Flink release is 2.3.0.
Known issues affecting 1.18.1
Exploited first, then by exploitation probability.
CVE-2026-35194 HIGH EPSS 0% → fixed in 2.1.2Other Flink versions
Check another release line of Flink.
Frequently asked
Is Flink 1.18.1 patched?
Flink 1.18.1 is end-of-life and no longer receives security patches. Move to 2.3.0.
What version should I upgrade Flink 1.18.1 to?
Upgrade Flink 1.18.1 to at least 1.20.4 to clear its 1 open critical-or-high vulnerability.
When does Flink 1.18 reach end-of-life?
Flink 1.18 reached end-of-life on 2025-03-24 and no longer receives security patches.
What is the latest version of Flink?
The latest supported Flink release is 2.3.0.
Is Flink 1.18.1 still receiving security updates?
No — Flink 1.18.1 is on the 1.18 line, which reached end-of-life on 2025-03-24 and no longer receives security updates. Upgrade to 2.3.0 or later to stay supported.
Informational only, from public data (NVD · CISA KEV · EPSS · endoflife.date), and can lag or miss vendor-specific fixes. Always confirm against Apache's official advisory before you patch or upgrade.