CVE-2026-85596

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.8 under NVD CVSS v3. EPSS exploit probability: 0.4%, top 65% 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
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.8Exploit: None knownExposed: 0

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

Traefik versions >= v3.7.0 and <= v3.7.10 contain an authentication bypass in the Kubernetes Ingress NGINX provider. The TLS option generated for an Ingress carrying the nginx.ingress.kubernetes.io/auth-tls-secret annotation was named after the Ingress namespace and name. As a result, two Ingress objects sharing the same host, the same client CA secret, and the same client-authentication mode produced two distinct TLS option names for that host. Traefik treats this as a TLS options conflict and falls back to the entry point's default TLS configuration, which does not request a client certificate, so a route configured with nginx.ingress.kubernetes.io/auth-tls-verify-client: "on" becomes reachable without a client certificate. Only the v3.7 line is affected; the issue is fixed in v3.7.11.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
44(Track)
EG Risk 44/100SSVC: 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
Severity98% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
35%
KEV
Not listed

Published

September 4, 2026

Last Modified

September 16, 2026

Advisory Details (2)

Auto-updated Sep 23, 2026
Patch available. Sources: github.
generic

Traefik v3.7 Authentication Bypass via TLS Option Conflict | Advisories | VulnCheck

https://www.vulncheck.com/advisories/traefik-3.7-authentication-bypass-via-tls-option-conflict
github Patch Available

Same-host Ingress TLS option conflict disables client-certificate authentication · Advisory · traefik/traefik · GitHub

https://github.com/traefik/traefik/security/advisories/GHSA-j994-9gqj-9hwq

Vendor Advisories for CVE-2026-85596(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 56× in last 7d / 122× 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 122 total refreshes for this CVE.

  1. 2026-09-25 09:56 UTCGHSA enrichment
  2. 2026-09-25 06:03 UTCGHSA enrichment
  3. 2026-09-25 02:11 UTCGHSA enrichment
  4. 2026-09-24 22:18 UTCGHSA enrichment
  5. 2026-09-24 18:25 UTCEG score recompute
  6. 2026-09-24 18:25 UTCGHSA enrichment
  7. 2026-09-24 14:04 UTCEPSS rescore
  8. 2026-09-24 13:35 UTCGHSA enrichment
  9. 2026-09-24 09:42 UTCGHSA enrichment
  10. 2026-09-24 05:49 UTCGHSA enrichment
  11. 2026-09-24 01:56 UTCGHSA enrichment
  12. 2026-09-23 22:04 UTCGHSA enrichment
  13. 2026-09-23 18:11 UTCEG score recompute
  14. 2026-09-23 18:11 UTCGHSA enrichment
  15. 2026-09-23 17:54 UTCEPSS rescore
  16. 2026-09-23 14:18 UTCGHSA enrichment
  17. 2026-09-23 10:25 UTCGHSA enrichment
  18. 2026-09-23 06:32 UTCGHSA enrichment
  19. 2026-09-23 02:38 UTCGHSA enrichment
  20. 2026-09-22 22:45 UTCGHSA enrichment
  21. 2026-09-22 18:52 UTCEG score recompute
  22. 2026-09-22 18:52 UTCGHSA enrichment
  23. 2026-09-22 16:01 UTCEPSS rescore
  24. 2026-09-22 14:59 UTCGHSA enrichment
  25. 2026-09-22 11:06 UTCGHSA enrichment
Show 75 more
  1. 2026-09-22 07:13 UTCGHSA enrichment
  2. 2026-09-22 03:21 UTCGHSA enrichment
  3. 2026-09-21 23:28 UTCEG score recompute
  4. 2026-09-21 23:28 UTCGHSA enrichment
  5. 2026-09-21 21:09 UTCEPSS rescore
  6. 2026-09-21 19:34 UTCGHSA enrichment
  7. 2026-09-21 15:41 UTCGHSA enrichment
  8. 2026-09-21 11:48 UTCGHSA enrichment
  9. 2026-09-21 07:55 UTCGHSA enrichment
  10. 2026-09-21 04:02 UTCGHSA enrichment
  11. 2026-09-21 00:09 UTCGHSA enrichment
  12. 2026-09-20 20:16 UTCEG score recompute
  13. 2026-09-20 20:16 UTCGHSA enrichment
  14. 2026-09-20 20:16 UTCEPSS rescore
  15. 2026-09-20 16:23 UTCGHSA enrichment
  16. 2026-09-20 12:31 UTCGHSA enrichment
  17. 2026-09-20 08:20 UTCGHSA enrichment
  18. 2026-09-20 04:27 UTCGHSA enrichment
  19. 2026-09-20 00:34 UTCGHSA enrichment
  20. 2026-09-19 20:41 UTCGHSA enrichment
  21. 2026-09-19 16:48 UTCEG score recompute
  22. 2026-09-19 16:48 UTCGHSA enrichment
  23. 2026-09-19 12:55 UTCGHSA enrichment
  24. 2026-09-19 09:03 UTCGHSA enrichment
  25. 2026-09-19 05:10 UTCGHSA enrichment
  26. 2026-09-19 01:16 UTCGHSA enrichment
  27. 2026-09-18 21:23 UTCEG score recompute
  28. 2026-09-18 21:23 UTCGHSA enrichment
  29. 2026-09-18 19:28 UTCEPSS rescore
  30. 2026-09-18 16:17 UTCGHSA enrichment
  31. 2026-09-18 11:56 UTCGHSA enrichment
  32. 2026-09-18 08:03 UTCGHSA enrichment
  33. 2026-09-18 04:10 UTCGHSA enrichment
  34. 2026-09-18 00:17 UTCGHSA enrichment
  35. 2026-09-17 20:24 UTCEG score recompute
  36. 2026-09-17 20:24 UTCGHSA enrichment
  37. 2026-09-17 19:32 UTCEPSS rescore
  38. 2026-09-17 13:01 UTCGHSA enrichment
  39. 2026-09-17 08:49 UTCGHSA enrichment
  40. 2026-09-17 04:56 UTCGHSA enrichment
  41. 2026-09-17 01:03 UTCGHSA enrichment
  42. 2026-09-16 21:10 UTCEG score recompute▲ 1.60
  43. 2026-09-16 21:10 UTCGHSA enrichment
  44. 2026-09-16 20:45 UTCNVD updateCVSS v3 → 9.8 · severity → CRITICAL
  45. 2026-09-16 18:29 UTCEG score recompute
  46. 2026-09-16 18:28 UTCGHSA enrichment
  47. 2026-09-16 14:09 UTCEPSS rescore
  48. 2026-09-16 05:20 UTCEG score recompute
  49. 2026-09-16 05:20 UTCGHSA enrichment
  50. 2026-09-16 05:15 UTCEPSS rescore
  51. 2026-09-15 18:19 UTCGHSA enrichment
  52. 2026-09-15 06:45 UTCEG score recompute
  53. 2026-09-15 06:45 UTCGHSA enrichment
  54. 2026-09-15 03:12 UTCEPSS rescore
  55. 2026-09-15 03:12 UTCEPSS rescore
  56. 2026-09-14 19:43 UTCGHSA enrichment
  57. 2026-09-14 08:41 UTCGHSA enrichment
  58. 2026-09-13 21:40 UTCEG score recompute
  59. 2026-09-13 21:40 UTCGHSA enrichment
  60. 2026-09-13 10:38 UTCGHSA enrichment
  61. 2026-09-12 23:36 UTCEG score recompute
  62. 2026-09-12 23:36 UTCGHSA enrichment
  63. 2026-09-12 12:34 UTCGHSA enrichment
  64. 2026-09-12 01:32 UTCGHSA enrichment
  65. 2026-09-11 14:30 UTCEG score recompute
  66. 2026-09-11 14:30 UTCGHSA enrichment
  67. 2026-09-11 03:28 UTCGHSA enrichment
  68. 2026-09-10 16:26 UTCEG score recompute
  69. 2026-09-10 16:26 UTCGHSA enrichment
  70. 2026-09-10 15:28 UTCEG score recompute
  71. 2026-09-10 15:28 UTCGHSA enrichment
  72. 2026-09-10 05:24 UTCGHSA enrichment
  73. 2026-09-09 18:22 UTCGHSA enrichment
  74. 2026-09-09 07:20 UTCEG score recompute
  75. 2026-09-09 07:20 UTCGHSA enrichment

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-85596?
CVE-2026-85596 is a critical vulnerability published on September 4, 2026. Traefik versions >= v3.7.0 and <= v3.7.10 contain an authentication bypass in the Kubernetes Ingress NGINX provider. The TLS option generated for an Ingress carrying the nginx.ingress.kubernetes.io/auth-tls-secret annotation was named after the Ingress namespace and name. As a result, two Ingress…
When was CVE-2026-85596 disclosed?
CVE-2026-85596 was first published in the National Vulnerability Database on September 4, 2026, with the most recent update on September 16, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-85596 actively exploited?
CVE-2026-85596 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 64.9% of all scored CVEs.
What is the CVSS score of CVE-2026-85596?
CVE-2026-85596 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-85596?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-85596, 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.

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