Apache ZooKeeper ↗

Apache · Infra / Coordination

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

3.9.5 · latest cycle100/100 Healthy

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

Apache ZooKeeper currently scores 100/100 — healthy. No tracked vulnerabilities are currently known to be exploited in the wild. The latest supported release is 3.9.5. It's on the latest patch with no significant known issues — keep it current.

Disclosure trend iNew CVEs published for Apache ZooKeeper 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.

Most urgent first — actively exploited, then likeliest to be exploited.

CVE-2017-5637 HIGH Missing authentication EPSS 74% → see advisory CVE-2023-44981 CRITICAL Authorization bypass EPSS 2% → fixed in 3.8.3 CVE-2024-51504 CRITICAL CWE-290 EPSS 1% → fixed in 3.9.3

See all 11 known Apache ZooKeeper 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 Apache ZooKeeper release line is supported — and when it sunsets. Select a line for its full report.

Jan19'24 Apache ZooKeeper 3.7ended 2024-01-19

Dec30'22 Apache ZooKeeper 3.6ended 2022-12-30

Jun1'22 Apache ZooKeeper 3.5ended 2022-06-01

Jun1'20 Apache ZooKeeper 3.4ended 2020-06-01

Full Apache ZooKeeper end-of-life dates & support timeline →

3.9 latest 3.9.5 Supported 3.9.5 → 3.8 latest 3.8.6 Supported 3.8.6 → 3.7 latest 3.7.2 End of life ended 2024-01-193.7.2 → 3.6 latest 3.6.4 End of life ended 2022-12-303.6.4 → 3.5 latest 3.5.10 End of life ended 2022-06-013.5.10 → 3.4 latest 3.4.14 End of life ended 2020-06-013.4.14 → See all upcoming end-of-life dates →

Frequently asked

Is Apache ZooKeeper safe and patched?

What should I do about Apache ZooKeeper now?

Upgrade Apache ZooKeeper to the latest supported release (3.9.5) or later and apply available security updates, then confirm against Apache's official advisory.

When does Apache ZooKeeper reach end-of-life?

The latest supported Apache ZooKeeper release is 3.9.5. After end-of-life a release no longer receives security patches.

Which versions of Apache ZooKeeper are still receiving security updates?

Supported Apache ZooKeeper release lines (latest 3.9.5): 3.9, 3.8. 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 Apache's official advisory before you patch or upgrade — Apache ZooKeeper official site ↗