etcd vulnerabilities: known CVEs & security history
CNCF · Infra / Coordination · 10 tracked CVEs · 0 actively exploited · updated June 2026 · what is a CVE? →
This is the full list of known vulnerabilities (CVEs) across all etcd release lines — 10 in total. A CVE here doesn't mean your version is affected — check etcd's current status and the safe version to run.
Known etcd CVEs
Actively-exploited and most-severe first. Open any CVE for full details.
| CVE | Severity | CVSS | EPSS | Year |
|---|---|---|---|---|
| CVE-2021-28235 | critical | 9.8 | 2% | 2023 |
| CVE-2026-33413 | high | 8.8 | 0% | 2026 |
| CVE-2018-16886 | high | 8.1 | 4% | 2019 |
| CVE-2022-34038 | high | 7.5 | 1% | 2023 |
| CVE-2020-15112 | medium | 6.5 | 1% | 2020 |
| CVE-2020-15106 | medium | 6.5 | 1% | 2020 |
| CVE-2020-15113 | medium | 5.7 | 0% | 2020 |
| CVE-2023-32082 | low | 3.1 | 1% | 2023 |
| CVE-2026-44283 | none | 0 | 0% | 2026 |
| CVE-2026-33343 | none | 0 | 0% | 2026 |
Is my etcd 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 etcd version → · Monitor etcd for new CVEs →
etcd vulnerabilities — frequently asked
How many known vulnerabilities does etcd have?
IsItPatched tracks 10 CVEs for etcd. 1 is critical-severity and 3 high-severity. These span every release line — what matters is whether the version you run is affected.
Does etcd have any actively-exploited vulnerabilities?
None of etcd'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 etcd vulnerability?
Among tracked issues, CVE-2021-28235 (CRITICAL, CVSS 9.8) ranks highest — a Improper authentication weakness.
Is etcd safe to use?
It depends on the version. The latest supported etcd release (3.6.12) 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: etcd security status · etcd end-of-life · actively-exploited CVEs. Always verify against CNCF's advisories — see our disclaimer.