CVE-2026-35051

CRITICALNVD 10.010.0—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 10.0 under NVD CVSS v3. EPSS exploit probability: 0.0%, top 90% 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
10.0
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 10.0Exploit: NoneExposed: 0

A fix is available — apply it.

Traefik is an HTTP reverse proxy and load balancer. Prior to versions 2.11.43, 3.6.14, and 3.7.0-rc.2, there is an authentication bypass vulnerability in Traefik's ForwardAuth middleware when trustForwardHeader=false is configured and Traefik is deployed behind a trusted upstream proxy. This issue has been patched in versions 2.11.43, 3.6.14, and 3.7.0-rc.2.

CVSS v3
10.0
EG Score
10.0(medium)
EPSS
18.5%
KEV
Not listed

Published

April 30, 2026

Last Modified

July 15, 2026

Advisory Details (8)

Auto-updated Jul 15, 2026
🔬 Proof of concept available. Patch available. Sources: github_release, github, redhat.
redhat Patch Available
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-35051.json
redhat

2464235 – (CVE-2026-35051) CVE-2026-35051 Traefik: github.com/traefik/traefik: Traefik: Authentication bypass in ForwardAuth middleware

https://bugzilla.redhat.com/show_bug.cgi?id=2464235
redhat Patch Available

cve-details

https://access.redhat.com/security/cve/CVE-2026-35051
redhat Patch Available
https://access.redhat.com/errata/RHSA-2026:21772
github Patch Available🟡 PoC Available

ForwardAuth trustForwardHeader=false allows spoofed X-Forwarded-Prefix to bypass auth · Advisory · traefik/traefik · GitHub

https://github.com/traefik/traefik/security/advisories/GHSA-6384-m2mw-rf54
github_release Patch Available

v3.7.0-rc.2

Patch available: traefik/traefik v3.7.0-rc.2 (pre-release)

https://github.com/traefik/traefik/releases/tag/v3.7.0-rc.2
github_release Patch Available

v3.6.14

Patch available: traefik/traefik v3.6.14

https://github.com/traefik/traefik/releases/tag/v3.6.14
github_release Patch Available

v2.11.43

Patch available: traefik/traefik v2.11.43

https://github.com/traefik/traefik/releases/tag/v2.11.43

Vendor Advisories for CVE-2026-35051(1)

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

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatdevspaces/traefik-rhel9:17797867792026-05-28redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(3 across 1 ecosystem)
Go(3)
PackageVulnerable rangeFixed inDependents
github.com/traefik/traefik———
github.com/traefik/traefik/v2—2.11.43—
github.com/traefik/traefik/v3—3.6.14—

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 11× in last 7d / 44× 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 229 total refreshes for this CVE.

  1. 2026-07-15 16:57 UTCEPSS rescore
  2. 2026-07-15 16:57 UTCEPSS rescore
  3. 2026-07-15 02:25 UTCNVD updateCVSS v3 → 10 · severity → CRITICAL
  4. 2026-07-15 02:00 UTCEPSS rescore
  5. 2026-07-15 01:21 UTCMITRE cvelistV5CVSS v3 → 8.2 · severity → HIGH
  6. 2026-07-13 22:30 UTCEPSS rescore
  7. 2026-07-13 06:13 UTCEPSS rescore
  8. 2026-07-13 06:13 UTCEPSS rescore
  9. 2026-07-12 05:46 UTCEPSS rescore
  10. 2026-07-11 08:27 UTCEPSS rescore
  11. 2026-07-09 19:10 UTCEPSS rescore
  12. 2026-07-08 15:15 UTCEPSS rescore
  13. 2026-07-07 13:46 UTCEPSS rescore
  14. 2026-07-06 16:27 UTCEPSS rescore
  15. 2026-07-06 16:27 UTCEPSS rescore
  16. 2026-07-06 02:23 UTCEPSS rescore
  17. 2026-07-06 02:23 UTCEPSS rescore
  18. 2026-07-05 02:30 UTCEPSS rescore
  19. 2026-07-04 06:31 UTCEPSS rescore
  20. 2026-07-01 15:06 UTCEPSS rescore
  21. 2026-06-30 23:22 UTCEPSS rescore
  22. 2026-06-29 14:06 UTCEPSS rescore
  23. 2026-06-29 14:06 UTCEPSS rescore
  24. 2026-06-28 14:07 UTCEPSS rescore
  25. 2026-06-28 14:07 UTCEPSS rescore
Show 75 more
  1. 2026-06-28 04:56 UTCEPSS rescore
  2. 2026-06-28 04:56 UTCEPSS rescore
  3. 2026-06-27 03:08 UTCEPSS rescore
  4. 2026-06-25 13:49 UTCEPSS rescore
  5. 2026-06-25 13:49 UTCEPSS rescore
  6. 2026-06-24 14:05 UTCEPSS rescore
  7. 2026-06-23 21:33 UTCEPSS rescore
  8. 2026-06-23 21:33 UTCEPSS rescore
  9. 2026-06-22 14:25 UTCEPSS rescore
  10. 2026-06-22 14:25 UTCEPSS rescore
  11. 2026-06-21 14:56 UTCEPSS rescore
  12. 2026-06-21 14:56 UTCEPSS rescore
  13. 2026-06-21 01:59 UTCEPSS rescore
  14. 2026-06-19 19:25 UTCEPSS rescore
  15. 2026-06-19 19:25 UTCEPSS rescore
  16. 2026-06-18 17:52 UTCEPSS rescore
  17. 2026-06-18 17:52 UTCEPSS rescore
  18. 2026-06-17 17:53 UTCEPSS rescore
  19. 2026-06-16 17:52 UTCEPSS rescore
  20. 2026-06-15 17:49 UTCEPSS rescore
  21. 2026-06-15 05:44 UTCEG score recompute
  22. 2026-06-15 05:44 UTCVendor advisory
  23. 2026-06-15 01:30 UTCEG score recompute
  24. 2026-06-15 01:30 UTCVendor advisory
  25. 2026-06-14 23:18 UTCEPSS rescore
  26. 2026-06-14 20:40 UTCEG score recompute
  27. 2026-06-14 20:40 UTCVendor advisory
  28. 2026-06-14 16:27 UTCEG score recompute
  29. 2026-06-14 16:27 UTCVendor advisory
  30. 2026-06-14 09:15 UTCEG score recompute
  31. 2026-06-14 09:15 UTCVendor advisory
  32. 2026-06-13 23:00 UTCEPSS rescore
  33. 2026-06-12 23:12 UTCEPSS rescore
  34. 2026-06-12 23:12 UTCEPSS rescore
  35. 2026-06-12 11:02 UTCEG score recompute
  36. 2026-06-12 11:02 UTCVendor advisory
  37. 2026-06-12 06:41 UTCEG score recompute
  38. 2026-06-12 06:41 UTCVendor advisory
  39. 2026-06-12 02:25 UTCEG score recompute
  40. 2026-06-12 02:25 UTCVendor advisory
  41. 2026-06-11 22:11 UTCEG score recompute
  42. 2026-06-11 22:11 UTCVendor advisory
  43. 2026-06-11 17:58 UTCEG score recompute
  44. 2026-06-11 17:58 UTCVendor advisory
  45. 2026-06-11 14:00 UTCEPSS rescore
  46. 2026-06-11 13:45 UTCEG score recompute
  47. 2026-06-11 13:45 UTCVendor advisory
  48. 2026-06-11 09:32 UTCEG score recompute
  49. 2026-06-11 09:32 UTCVendor advisory
  50. 2026-06-11 04:47 UTCEG score recompute
  51. 2026-06-11 04:47 UTCVendor advisory
  52. 2026-06-10 22:18 UTCEPSS rescore
  53. 2026-06-10 20:58 UTCEG score recompute
  54. 2026-06-10 20:58 UTCVendor advisory
  55. 2026-06-10 16:33 UTCEG score recompute
  56. 2026-06-10 16:33 UTCVendor advisory
  57. 2026-06-10 13:22 UTCEPSS rescore
  58. 2026-06-10 12:19 UTCEG score recompute
  59. 2026-06-10 12:19 UTCVendor advisory
  60. 2026-06-10 08:06 UTCEG score recompute
  61. 2026-06-10 08:06 UTCVendor advisory
  62. 2026-06-10 03:41 UTCEG score recompute
  63. 2026-06-10 03:41 UTCVendor advisory
  64. 2026-06-09 23:28 UTCEG score recompute
  65. 2026-06-09 23:28 UTCVendor advisory
  66. 2026-06-09 16:55 UTCEG score recompute
  67. 2026-06-09 16:55 UTCVendor advisory
  68. 2026-06-09 12:42 UTCEG score recompute
  69. 2026-06-09 12:42 UTCVendor advisory
  70. 2026-06-09 08:29 UTCEG score recompute
  71. 2026-06-09 08:29 UTCVendor advisory
  72. 2026-06-09 03:53 UTCEG score recompute
  73. 2026-06-09 03:53 UTCVendor advisory
  74. 2026-06-08 23:39 UTCEG score recompute
  75. 2026-06-08 23:39 UTCVendor advisory

Frequently asked(5)

What is CVE-2026-35051?
CVE-2026-35051 is a critical vulnerability published on April 30, 2026. Traefik is an HTTP reverse proxy and load balancer. Prior to versions 2.11.43, 3.6.14, and 3.7.0-rc.2, there is an authentication bypass vulnerability in Traefik's ForwardAuth middleware when trustForwardHeader=false is configured and Traefik is deployed behind a trusted upstream proxy. This issue…
When was CVE-2026-35051 disclosed?
CVE-2026-35051 was first published in the National Vulnerability Database on April 30, 2026, with the most recent update on July 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-35051 actively exploited?
CVE-2026-35051 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 18.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-35051?
CVE-2026-35051 has a CVSS v3 base score of 10.0 (NVD).
How do I remediate CVE-2026-35051?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-35051, 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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