CVE-2026-29054

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.5 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.5%, top 62% 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
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.6%CVSS: 7.5Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Traefik is an HTTP reverse proxy and load balancer. From version 2.11.9 to 2.11.37 and from version 3.1.3 to 3.6.8, there is a potential vulnerability in Traefik managing the Connection header with X-Forwarded headers. When Traefik processes HTTP/1.1 requests, the protection put in place to prevent the removal of Traefik-managed X-Forwarded headers (such as X-Real-Ip, X-Forwarded-Host, X-Forwarded-Port, etc.) via the Connection header does not handle case sensitivity correctly. The Connection tokens are compared case-sensitively against the protected header names, but the actual header deletion operates case-insensitively. As a result, a remote unauthenticated client can use lowercase Connection tokens (e.g. Connection: x-real-ip) to bypass the protection and trigger the removal of Traefik-managed forwarded identity headers. This issue has been patched in versions 2.11.38 and 3.6.9.

CVSS v3
7.5
EG Score
7.5HIGHmedium confidence
EG Risk
49
EG Risk 49/100

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
Severity75% × 45%
Exploitation0% × 40%
Automatability100% × 15%
EPSS PROB
0.6%
EPSS %ILE
48th
KEV
Not listed

Published

March 5, 2026

Last Modified

July 15, 2026

Advisory Details (7)

Auto-updated Jul 3, 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-2026-29054.json
redhat

2444872 – (CVE-2026-29054) CVE-2026-29054 github.com/traefik/traefik: Traefik: Information disclosure due to case-insensitive Connection header processing

https://bugzilla.redhat.com/show_bug.cgi?id=2444872
redhat Patch Available

cve-details

https://access.redhat.com/security/cve/CVE-2026-29054
redhat Patch Available
https://access.redhat.com/errata/RHSA-2026:10175
github Patch Available🟡 PoC Available

Case-Sensitive Bypass in Connection Header Allows Removal of X-Forwarded Headers · Advisory · traefik/traefik · GitHub

https://github.com/traefik/traefik/security/advisories/GHSA-92mv-8f8w-wq52
github_release Patch Available

v3.6.9

Patch available: traefik/traefik v3.6.9

https://github.com/traefik/traefik/releases/tag/v3.6.9
github_release Patch Available

v2.11.38

Patch available: traefik/traefik v2.11.38

https://github.com/traefik/traefik/releases/tag/v2.11.38

Vendor Advisories for CVE-2026-29054(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 / EcosystemFix (by version range) / PatchReleasedSource
redhatdevspaces/traefik-rhel9:17767185852026-04-23redhat

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 rangeFix by version rangeDependents
github.com/traefik/traefik—
  • every version on: no fix on record
—
github.com/traefik/traefik/v2—
  • 2.11.9 up to 2.11.38: fixed in 2.11.38
—
github.com/traefik/traefik/v3—
  • 3.1.3 up to 3.6.9: fixed in 3.6.9
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 5× in last 7d / 24× 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 132 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2026-29054?
CVE-2026-29054 is a high vulnerability published on March 5, 2026. Traefik is an HTTP reverse proxy and load balancer. From version 2.11.9 to 2.11.37 and from version 3.1.3 to 3.6.8, there is a potential vulnerability in Traefik managing the Connection header with X-Forwarded headers. When Traefik processes HTTP/1.1 requests, the protection put in place to prevent…
When was CVE-2026-29054 disclosed?
CVE-2026-29054 was first published on March 5, 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-2026-29054 actively exploited?
CVE-2026-29054 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.6% probability of exploitation in the next 30 days (48th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-29054?
CVE-2026-29054 has a CVSS base score of 7.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-29054?
A fix for CVE-2026-29054 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-29054 are linked in the Vendor Advisories panel on this page.

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