CVE-2026-59818

HIGHNVD 8.18.1—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.1 under NVD CVSS v3. EPSS exploit probability: 0.4%, top 64% 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, nvd
Trending — 3 sources updated this week
8.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.1Exploit: None knownExposed: 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
8.1
EG Score
8.1(medium)
EG Risk
37(Track)
EG Risk 37/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity81% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
36%
KEV
Not listed

Published

July 8, 2026

Last Modified

July 13, 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.

Affected Packages

(2 across 2 ecosystems)
Debian:13(1)
PackageVulnerable rangeFixed inDependents
etcd3.5.16-10 ... 3.5.30-2 (13 versions)——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
etcd3.5.16-10 ... 3.5.30-2 (13 versions)——

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 18× in last 7d / 93× 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.

Showing the most recent 100 of 145 total refreshes for this CVE.

  1. 2026-08-30 07:28 UTCEG score recompute
  2. 2026-08-30 07:28 UTCVendor advisory
  3. 2026-08-30 01:22 UTCEPSS rescore
  4. 2026-08-28 21:42 UTCEPSS rescore
  5. 2026-08-27 21:48 UTCEG score recompute
  6. 2026-08-27 21:48 UTCVendor advisory
  7. 2026-08-27 14:25 UTCEPSS rescore
  8. 2026-08-27 01:21 UTCEG score recompute
  9. 2026-08-27 01:21 UTCVendor advisory
  10. 2026-08-26 14:46 UTCEPSS rescore
  11. 2026-08-26 04:45 UTCEG score recompute
  12. 2026-08-26 04:45 UTCVendor advisory
  13. 2026-08-25 13:49 UTCEPSS rescore
  14. 2026-08-25 10:09 UTCVendor advisory
  15. 2026-08-24 20:24 UTCEG score recompute
  16. 2026-08-24 20:24 UTCVendor advisory
  17. 2026-08-24 05:36 UTCVendor advisory
  18. 2026-08-23 17:36 UTCVendor advisory
  19. 2026-08-23 05:37 UTCEG score recompute
  20. 2026-08-23 05:37 UTCVendor advisory
  21. 2026-08-23 00:19 UTCEPSS rescore
  22. 2026-08-22 17:37 UTCVendor advisory
  23. 2026-08-22 04:44 UTCEG score recompute
  24. 2026-08-22 04:44 UTCVendor advisory
  25. 2026-08-21 23:49 UTCEPSS rescore
Show 75 more
  1. 2026-08-21 03:57 UTCEG score recompute
  2. 2026-08-21 03:57 UTCVendor advisory
  3. 2026-08-20 22:55 UTCEPSS rescore
  4. 2026-08-20 15:22 UTCVendor advisory
  5. 2026-08-20 01:56 UTCEG score recompute
  6. 2026-08-19 17:04 UTCEPSS rescore
  7. 2026-08-19 10:52 UTCVendor advisory
  8. 2026-08-18 22:53 UTCEG score recompute
  9. 2026-08-18 22:53 UTCVendor advisory
  10. 2026-08-18 13:48 UTCEPSS rescore
  11. 2026-08-18 10:48 UTCVendor advisory
  12. 2026-08-17 22:21 UTCEG score recompute
  13. 2026-08-17 22:21 UTCVendor advisory
  14. 2026-08-17 13:47 UTCEPSS rescore
  15. 2026-08-17 06:05 UTCVendor advisory
  16. 2026-08-16 17:24 UTCEG score recompute
  17. 2026-08-16 17:24 UTCVendor advisory
  18. 2026-08-16 14:56 UTCEPSS rescore
  19. 2026-08-16 05:25 UTCEG score recompute
  20. 2026-08-16 05:25 UTCVendor advisory
  21. 2026-08-16 02:14 UTCEPSS rescore
  22. 2026-08-15 17:26 UTCVendor advisory
  23. 2026-08-15 05:26 UTCEG score recompute
  24. 2026-08-15 05:26 UTCVendor advisory
  25. 2026-08-15 01:30 UTCEPSS rescore
  26. 2026-08-14 17:26 UTCVendor advisory
  27. 2026-08-14 05:08 UTCEG score recompute
  28. 2026-08-14 05:08 UTCVendor advisory
  29. 2026-08-13 22:00 UTCEPSS rescore
  30. 2026-08-13 17:08 UTCVendor advisory
  31. 2026-08-12 16:46 UTCEG score recompute
  32. 2026-08-12 16:46 UTCVendor advisory
  33. 2026-08-12 13:51 UTCEPSS rescore
  34. 2026-08-12 04:47 UTCVendor advisory
  35. 2026-08-11 16:48 UTCEG score recompute
  36. 2026-08-11 16:48 UTCVendor advisory
  37. 2026-08-11 04:48 UTCEG score recompute
  38. 2026-08-11 04:48 UTCVendor advisory
  39. 2026-08-11 00:00 UTCEPSS rescore
  40. 2026-08-09 15:47 UTCEG score recompute
  41. 2026-08-09 13:46 UTCEPSS rescore
  42. 2026-08-09 03:48 UTCEG score recompute
  43. 2026-08-09 03:48 UTCVendor advisory
  44. 2026-08-08 16:37 UTCEPSS rescore
  45. 2026-08-08 15:49 UTCVendor advisory
  46. 2026-08-08 03:49 UTCEG score recompute
  47. 2026-08-07 03:51 UTCVendor advisory
  48. 2026-08-06 15:52 UTCEG score recompute
  49. 2026-08-06 15:52 UTCVendor advisory
  50. 2026-08-06 13:47 UTCEPSS rescore
  51. 2026-08-06 03:51 UTCEG score recompute
  52. 2026-08-06 03:51 UTCVendor advisory
  53. 2026-08-05 19:17 UTCEPSS rescore
  54. 2026-08-05 15:52 UTCVendor advisory
  55. 2026-08-05 01:40 UTCEG score recompute
  56. 2026-08-05 01:40 UTCVendor advisory
  57. 2026-08-04 15:10 UTCEPSS rescore
  58. 2026-08-04 13:41 UTCEG score recompute
  59. 2026-08-04 13:41 UTCVendor advisory
  60. 2026-08-04 10:39 UTCEPSS rescore
  61. 2026-08-03 00:46 UTCVendor advisory
  62. 2026-08-02 12:46 UTCVendor advisory
  63. 2026-08-02 00:47 UTCVendor advisory
  64. 2026-08-01 12:47 UTCEG score recompute
  65. 2026-08-01 12:47 UTCVendor advisory
  66. 2026-08-01 04:16 UTCEPSS rescore
  67. 2026-08-01 00:44 UTCVendor advisory
  68. 2026-07-31 12:41 UTCVendor advisory
  69. 2026-07-31 00:41 UTCEG score recompute
  70. 2026-07-30 16:28 UTCEPSS rescore
  71. 2026-07-30 12:42 UTCEG score recompute
  72. 2026-07-30 12:42 UTCVendor advisory
  73. 2026-07-30 01:30 UTCEPSS rescore
  74. 2026-07-30 01:30 UTCEPSS rescore
  75. 2026-07-30 00:41 UTCVendor advisory

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-59818?
CVE-2026-59818 is a high 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 13, 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 0% probability of exploitation in the next 30 days, which ranks it in the top 64.3% of all scored CVEs.
What is the CVSS score of CVE-2026-59818?
CVE-2026-59818 has a CVSS v3 base score of 8.1 (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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-59818

Explore →

Is Your Infrastructure Affected by CVE-2026-59818?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs