CVE-2026-54764

MEDIUMNVD 5.85.8—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.8 under NVD CVSS v3. EPSS exploit probability: 0.3%, top 80% 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
5.8EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.8Exploit: None knownExposed: 0

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

Traefik is an HTTP reverse proxy and load balancer. Prior to v2.11.51, v3.6.22, and v3.7.6, Traefik's ForwardAuth middleware, even when configured with trustForwardHeader: false, derives the X-Forwarded-Port header sent to the authentication service from the original incoming request instead of the sanitized forwarded request. As a result, an unauthenticated remote attacker can inject an X-Forwarded-Proto: https header over a plain HTTP connection and cause Traefik to forward X-Forwarded-Port: 443 to the authentication service, bypassing port-based authorization checks. This issue is fixed in versions v2.11.51, v3.6.22, and v3.7.6.

CVSS v3
5.8
EG Score
5.8(medium)
EG Risk
41(Track)
EG Risk 41/100SSVC: 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
Severity58% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
20%
KEV
Not listed

Published

July 6, 2026

Last Modified

July 8, 2026

Advisory Details (3)

Auto-updated Jul 7, 2026
🔬 Proof of concept available. Patch available. Sources: github_commit, github_pr, github.
github Patch Available🟡 PoC Available

ForwardAuth middleware leaks X-Forwarded-Port spoofing via untrusted X-Forwarded-Proto when trustForwardHeader=false · Advisory · traefik/traefik · GitHub

https://github.com/traefik/traefik/security/advisories/GHSA-3q9r-p662-5j8m
github_pr

Fix x-forwarded-port in forward-auth

Fix merged in traefik/traefik PR #13344 on 2026-06-11 — awaiting tagged release

https://github.com/traefik/traefik/pull/13344
github_commit

commit 7ae92d8c2c10 (traefik/traefik)

Fix landed in traefik/traefik commit 7ae92d8c2c10 — awaiting tagged release

https://github.com/traefik/traefik/commit/7ae92d8c2c10ac04ef5a03df0ed5019ce0f44b2d

Vendor Advisories for CVE-2026-54764(1)

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

Affected Packages

(3 across 1 ecosystem)
Go(3)
PackageVulnerable rangeFixed inDependents
github.com/traefik/traefik———
github.com/traefik/traefik/v2—2.11.51—
github.com/traefik/traefik/v3—3.7.6—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 11× in last 7d / 53× 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. 2026-08-26 14:46 UTCEPSS rescore
  2. 2026-08-26 13:54 UTCEG score recompute
  3. 2026-08-25 13:49 UTCEPSS rescore
  4. 2026-08-24 23:21 UTCEG score recompute
  5. 2026-08-23 00:43 UTCEG score recompute
  6. 2026-08-23 00:19 UTCEPSS rescore
  7. 2026-08-22 01:23 UTCEG score recompute
  8. 2026-08-21 23:49 UTCEPSS rescore
  9. 2026-08-21 02:04 UTCEG score recompute
  10. 2026-08-20 22:55 UTCEPSS rescore
  11. 2026-08-20 02:26 UTCEG score recompute
  12. 2026-08-19 17:04 UTCEPSS rescore
  13. 2026-08-18 22:29 UTCEG score recompute
  14. 2026-08-18 13:48 UTCEPSS rescore
  15. 2026-08-17 22:58 UTCEG score recompute
  16. 2026-08-17 13:47 UTCEPSS rescore
  17. 2026-08-16 23:37 UTCEG score recompute
  18. 2026-08-16 14:56 UTCEPSS rescore
  19. 2026-08-16 02:14 UTCEPSS rescore
  20. 2026-08-16 00:18 UTCEG score recompute
  21. 2026-08-15 01:30 UTCEPSS rescore
  22. 2026-08-14 01:41 UTCEG score recompute
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  24. 2026-08-13 02:22 UTCEG score recompute
  25. 2026-08-12 13:51 UTCEPSS rescore
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  1. 2026-08-12 03:04 UTCEG score recompute
  2. 2026-08-11 03:44 UTCEG score recompute
  3. 2026-08-11 00:00 UTCEPSS rescore
  4. 2026-08-10 04:26 UTCEG score recompute
  5. 2026-08-09 13:46 UTCEPSS rescore
  6. 2026-08-09 05:07 UTCEG score recompute
  7. 2026-08-08 16:37 UTCEPSS rescore
  8. 2026-08-08 05:49 UTCEG score recompute
  9. 2026-08-07 06:30 UTCEG score recompute
  10. 2026-08-06 13:47 UTCEPSS rescore
  11. 2026-08-06 07:11 UTCEG score recompute
  12. 2026-08-05 19:17 UTCEPSS rescore
  13. 2026-08-05 07:52 UTCEG score recompute
  14. 2026-08-04 15:10 UTCEPSS rescore
  15. 2026-08-04 10:39 UTCEPSS rescore
  16. 2026-08-04 08:34 UTCEG score recompute
  17. 2026-08-03 10:36 UTCEPSS rescore
  18. 2026-08-02 09:48 UTCEG score recompute
  19. 2026-08-02 02:27 UTCEPSS rescore
  20. 2026-08-01 10:29 UTCEG score recompute
  21. 2026-08-01 04:16 UTCEPSS rescore
  22. 2026-07-31 11:10 UTCEG score recompute
  23. 2026-07-30 16:28 UTCEPSS rescore
  24. 2026-07-30 11:22 UTCEG score recompute
  25. 2026-07-30 01:30 UTCEPSS rescore
  26. 2026-07-29 12:01 UTCEG score recompute
  27. 2026-07-28 15:37 UTCEPSS rescore
  28. 2026-07-28 12:41 UTCEG score recompute
  29. 2026-07-27 12:05 UTCEG score recompute
  30. 2026-07-26 14:54 UTCEPSS rescore
  31. 2026-07-26 12:46 UTCEG score recompute
  32. 2026-07-25 14:18 UTCEPSS rescore
  33. 2026-07-24 14:18 UTCEPSS rescore
  34. 2026-07-23 14:18 UTCEPSS rescore
  35. 2026-07-23 03:19 UTCEG score recompute
  36. 2026-07-22 14:08 UTCEPSS rescore
  37. 2026-07-21 15:25 UTCEPSS rescore
  38. 2026-07-20 17:08 UTCEPSS rescore
  39. 2026-07-19 14:31 UTCEPSS rescore
  40. 2026-07-19 14:31 UTCEPSS rescore
  41. 2026-07-19 02:29 UTCEPSS rescore
  42. 2026-07-18 10:04 UTCEPSS rescore
  43. 2026-07-16 17:03 UTCEPSS rescore
  44. 2026-07-15 16:57 UTCEPSS rescore
  45. 2026-07-15 16:57 UTCEPSS rescore
  46. 2026-07-15 02:00 UTCEPSS rescore
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  48. 2026-07-13 22:31 UTCEPSS rescore
  49. 2026-07-13 06:13 UTCEPSS rescore
  50. 2026-07-13 06:13 UTCEPSS rescore
  51. 2026-07-12 05:46 UTCEPSS rescore
  52. 2026-07-11 08:27 UTCEPSS rescore
  53. 2026-07-11 08:27 UTCEPSS rescore
  54. 2026-07-09 19:10 UTCEPSS rescore
  55. 2026-07-09 19:10 UTCEPSS rescore
  56. 2026-07-08 19:07 UTCEG score recompute▼ 1.10
  57. 2026-07-08 15:16 UTCEPSS rescore
  58. 2026-07-08 15:16 UTCEPSS rescore
  59. 2026-07-08 04:32 UTCNVD updateCVSS v3 → 5.8
  60. 2026-07-07 13:46 UTCEPSS rescore
  61. 2026-07-07 13:46 UTCEPSS rescore
  62. 2026-07-06 20:30 UTCEG score recompute
  63. 2026-07-06 20:29 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-54764?
CVE-2026-54764 is a medium vulnerability published on July 6, 2026. Traefik is an HTTP reverse proxy and load balancer. Prior to v2.11.51, v3.6.22, and v3.7.6, Traefik's ForwardAuth middleware, even when configured with trustForwardHeader: false, derives the X-Forwarded-Port header sent to the authentication service from the original incoming request instead of the…
When was CVE-2026-54764 disclosed?
CVE-2026-54764 was first published in the National Vulnerability Database on July 6, 2026, with the most recent update on July 8, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-54764 actively exploited?
CVE-2026-54764 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 79.9% of all scored CVEs.
What is the CVSS score of CVE-2026-54764?
CVE-2026-54764 has a CVSS v3 base score of 5.8 (NVD).
How do I remediate CVE-2026-54764?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-54764, 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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