CVE-2026-59818

MEDIUMPre-NVD 6.56.5—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.5 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.4%, top 71% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
Trending — 3 sources updated this week
6.5
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 6.5Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

etcd is a distributed key-value store for the data of a distributed system. Prior to 3.5.32 and 3.6.13, when etcd is configured with --listen-client-http-urls to split HTTP and gRPC client endpoints onto separate listeners, the --client-crl-file Certificate Revocation List is not enforced on the gRPC listener, allowing a client with a revoked certificate to authenticate successfully over gRPC. This issue is fixed in versions 3.5.32 and 3.6.13.

CVSS v3
6.5
EG Score
6.5(medium)
EPSS
28.6%
KEV
Not listed

Published

July 8, 2026

Last Modified

July 10, 2026

Advisory Details (9)

Auto-updated Jul 8, 2026
Patch available. Sources: github_release, github, github_pr, github_commit.
github_release Patch Available

v3.6.13

Patch available: etcd-io/etcd v3.6.13

https://github.com/etcd-io/etcd/releases/tag/v3.6.13
github_release Patch Available

v3.5.32

Patch available: etcd-io/etcd v3.5.32

https://github.com/etcd-io/etcd/releases/tag/v3.5.32
github_commit

commit 8221ae82bc25 (etcd-io/etcd)

Fix landed in etcd-io/etcd commit 8221ae82bc25 — awaiting tagged release

https://github.com/etcd-io/etcd/commit/8221ae82bc25d4d55ca64382207b69be71038cbb
github_commit

commit 24838af5a53d (etcd-io/etcd)

Fix landed in etcd-io/etcd commit 24838af5a53d — awaiting tagged release

https://github.com/etcd-io/etcd/commit/24838af5a53dd0245adced920e42a9bf0e7a267f
github_commit

commit 2308ce157806 (etcd-io/etcd)

Fix landed in etcd-io/etcd commit 2308ce157806 — awaiting tagged release

https://github.com/etcd-io/etcd/commit/2308ce1578064641d4d67c40f0487309267d1bef
github_pr

[release-3.6] Reject the client request if the client certificate has been revoked

Fix merged in etcd-io/etcd PR #22025 on 2026-07-01 — awaiting tagged release

https://github.com/etcd-io/etcd/pull/22025
github_pr

[release-3.5] Reject the client request if the client certificate has been revoked

Fix merged in etcd-io/etcd PR #22021 on 2026-07-01 — awaiting tagged release

https://github.com/etcd-io/etcd/pull/22021
github_pr

Reject the client request if the client certificate has been revoked

Fix merged in etcd-io/etcd PR #22007 on 2026-07-01 — awaiting tagged release

https://github.com/etcd-io/etcd/pull/22007
github Patch Available

etcd: CRL enforcement bypass on gRPC listener when `--listen-client-http-urls` is configured · Advisory · etcd-io/etcd · GitHub

https://github.com/etcd-io/etcd/security/advisories/GHSA-3wh4-j44w-pg92

Vendor Advisories for CVE-2026-59818(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 11× in last 7d / 11× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-12 20:23 UTCEG score recompute
  2. 2026-07-12 05:46 UTCEPSS rescore
  3. 2026-07-11 20:35 UTCEG score recompute
  4. 2026-07-11 08:27 UTCEPSS rescore
  5. 2026-07-11 08:27 UTCEPSS rescore
  6. 2026-07-10 20:47 UTCEG score recompute
  7. 2026-07-09 20:59 UTCEG score recompute
  8. 2026-07-09 19:10 UTCEPSS rescore
  9. 2026-07-09 19:10 UTCEPSS rescore
  10. 2026-07-08 21:12 UTCEG score recompute
  11. 2026-07-08 21:10 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-59818?
CVE-2026-59818 is a medium vulnerability published on July 8, 2026. etcd is a distributed key-value store for the data of a distributed system. Prior to 3.5.32 and 3.6.13, when etcd is configured with --listen-client-http-urls to split HTTP and gRPC client endpoints onto separate listeners, the --client-crl-file Certificate Revocation List is not enforced on the…
When was CVE-2026-59818 disclosed?
CVE-2026-59818 was first published in the National Vulnerability Database on July 8, 2026, with the most recent update on July 10, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-59818 actively exploited?
CVE-2026-59818 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 28.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-59818?
CVE-2026-59818 has a CVSS v3 base score of 6.5 (NVD).
How do I remediate CVE-2026-59818?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-59818, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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