CVE-2026-65600

MEDIUMNVD 5.35.3—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.3 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
5.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.3Exploit: None knownExposed: 0

A fix is available — apply it.

Traefik versions <= v2.11.51, >= v3.6.0 <= v3.6.22, and >= v3.7.0 <= v3.7.6 contain an authentication bypass via path traversal in the ReplacePathRegex middleware. When ReplacePathRegex is configured with a regex that captures user-controlled path segments without a mandatory path separator (e.g. regex "^/api(.*)", replacement "/$1"), the middleware forwards the replaced path to the backend without validating that it matches its normalized form. An unauthenticated remote attacker can send a crafted request (e.g. GET /api../admin) that produces an un-normalized path such as /../admin, which a backend that normalizes paths resolves to a protected route, bypassing authentication middleware. Fixed in v2.11.52, v3.6.23, and v3.7.7.

CVSS v3
5.3
EG Score
5.3(medium)
EG Risk
39(Track)
EG Risk 39/100SSVC: 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
Severity53% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
35%
KEV
Not listed

Published

July 22, 2026

Last Modified

August 6, 2026

Advisory Details (2)

Auto-updated Jul 22, 2026
🔬 Proof of concept available. Patch available. Sources: github.
generic

Traefik before v2.11.52 Authentication Bypass via ReplacePathRegex | Advisories | VulnCheck

https://www.vulncheck.com/advisories/traefik-before-authentication-bypass-via-replacepathregex
github Patch Available🟡 PoC Available

Authentication Bypass via Path Traversal in ReplacePathRegex Middleware · Advisory · traefik/traefik · GitHub

https://github.com/traefik/traefik/security/advisories/GHSA-cxjq-mrr5-89rv

Vendor Advisories for CVE-2026-65600(2)

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-rhel9:17877567992026-09-01redhat

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—2.11.52—
github.com/traefik/traefik/v3—3.7.7—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 13× in last 7d / 55× 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 175 total refreshes for this CVE.

  1. 2026-09-18 19:28 UTCEPSS rescore
  2. 2026-09-18 08:46 UTCEG score recompute
  3. 2026-09-18 08:46 UTCVendor advisory
  4. 2026-09-17 09:46 UTCEG score recompute
  5. 2026-09-17 09:46 UTCVendor advisory
  6. 2026-09-16 14:08 UTCEPSS rescore
  7. 2026-09-16 07:05 UTCEG score recompute
  8. 2026-09-16 07:05 UTCVendor advisory
  9. 2026-09-16 05:15 UTCEPSS rescore
  10. 2026-09-13 22:26 UTCEG score recompute
  11. 2026-09-13 22:26 UTCVendor advisory
  12. 2026-09-12 19:52 UTCEG score recompute
  13. 2026-09-12 19:52 UTCVendor advisory
  14. 2026-09-11 20:56 UTCEG score recompute
  15. 2026-09-11 20:56 UTCVendor advisory
  16. 2026-09-11 14:53 UTCEPSS rescore
  17. 2026-09-11 09:37 UTCEPSS rescore
  18. 2026-09-10 21:40 UTCEG score recompute
  19. 2026-09-10 21:40 UTCVendor advisory
  20. 2026-09-09 09:18 UTCEG score recompute
  21. 2026-09-09 09:18 UTCVendor advisory
  22. 2026-09-08 22:01 UTCEPSS rescore
  23. 2026-09-07 21:43 UTCEG score recompute
  24. 2026-09-07 21:43 UTCVendor advisory
  25. 2026-09-07 16:01 UTCEPSS rescore
Show 75 more
  1. 2026-09-06 18:32 UTCEG score recompute
  2. 2026-09-06 18:32 UTCVendor advisory
  3. 2026-09-06 13:47 UTCEPSS rescore
  4. 2026-09-05 19:35 UTCEG score recompute
  5. 2026-09-05 19:35 UTCVendor advisory
  6. 2026-09-05 15:31 UTCEPSS rescore
  7. 2026-09-04 13:58 UTCEG score recompute
  8. 2026-09-04 13:58 UTCVendor advisory
  9. 2026-09-04 05:07 UTCEPSS rescore
  10. 2026-09-02 14:12 UTCEPSS rescore
  11. 2026-09-01 23:41 UTCEG score recompute
  12. 2026-09-01 13:54 UTCEPSS rescore
  13. 2026-09-01 04:40 UTCEPSS rescore
  14. 2026-08-30 23:52 UTCEG score recompute
  15. 2026-08-30 19:17 UTCEPSS rescore
  16. 2026-08-30 01:22 UTCEPSS rescore
  17. 2026-08-30 00:56 UTCEG score recompute
  18. 2026-08-28 21:42 UTCEPSS rescore
  19. 2026-08-27 21:10 UTCEG score recompute
  20. 2026-08-26 19:58 UTCEG score recompute
  21. 2026-08-26 14:47 UTCEPSS rescore
  22. 2026-08-25 20:49 UTCEG score recompute
  23. 2026-08-25 13:49 UTCEPSS rescore
  24. 2026-08-24 21:41 UTCEG score recompute
  25. 2026-08-23 22:29 UTCEG score recompute
  26. 2026-08-23 00:19 UTCEPSS rescore
  27. 2026-08-22 00:36 UTCEG score recompute
  28. 2026-08-21 23:49 UTCEPSS rescore
  29. 2026-08-21 01:40 UTCEG score recompute
  30. 2026-08-20 22:56 UTCEPSS rescore
  31. 2026-08-20 02:44 UTCEG score recompute
  32. 2026-08-19 17:04 UTCEPSS rescore
  33. 2026-08-19 03:37 UTCEG score recompute
  34. 2026-08-18 13:48 UTCEPSS rescore
  35. 2026-08-18 03:56 UTCEG score recompute
  36. 2026-08-17 13:47 UTCEPSS rescore
  37. 2026-08-17 04:59 UTCEG score recompute
  38. 2026-08-16 14:56 UTCEPSS rescore
  39. 2026-08-16 06:02 UTCEG score recompute
  40. 2026-08-15 07:07 UTCEG score recompute
  41. 2026-08-15 01:30 UTCEPSS rescore
  42. 2026-08-14 07:15 UTCEG score recompute
  43. 2026-08-13 22:00 UTCEPSS rescore
  44. 2026-08-13 08:19 UTCEG score recompute
  45. 2026-08-12 13:51 UTCEPSS rescore
  46. 2026-08-12 09:23 UTCEG score recompute
  47. 2026-08-11 10:27 UTCEG score recompute
  48. 2026-08-11 00:00 UTCEPSS rescore
  49. 2026-08-10 11:31 UTCEG score recompute
  50. 2026-08-09 13:47 UTCEPSS rescore
  51. 2026-08-09 12:35 UTCEG score recompute
  52. 2026-08-08 16:37 UTCEPSS rescore
  53. 2026-08-08 13:39 UTCEG score recompute
  54. 2026-08-06 15:47 UTCEG score recompute▼ 2.50
  55. 2026-08-06 15:47 UTCGHSA enrichment
  56. 2026-08-06 15:47 UTCNVD updateCVSS v3 → 5.3 · severity → MEDIUM
  57. 2026-08-06 13:47 UTCEPSS rescore
  58. 2026-08-06 05:01 UTCEG score recompute
  59. 2026-08-06 05:01 UTCGHSA enrichment
  60. 2026-08-05 19:17 UTCEPSS rescore
  61. 2026-08-05 19:17 UTCEPSS rescore
  62. 2026-08-05 17:33 UTCGHSA enrichment
  63. 2026-08-05 06:01 UTCGHSA enrichment
  64. 2026-08-04 18:31 UTCEG score recompute
  65. 2026-08-04 18:31 UTCGHSA enrichment
  66. 2026-08-04 15:10 UTCEPSS rescore
  67. 2026-08-04 10:39 UTCEPSS rescore
  68. 2026-08-04 07:02 UTCGHSA enrichment
  69. 2026-08-03 19:33 UTCGHSA enrichment
  70. 2026-08-03 08:04 UTCGHSA enrichment
  71. 2026-08-02 20:35 UTCGHSA enrichment
  72. 2026-08-02 09:05 UTCEG score recompute
  73. 2026-08-02 09:05 UTCGHSA enrichment
  74. 2026-08-02 02:27 UTCEPSS rescore
  75. 2026-08-01 21:36 UTCGHSA enrichment

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Frequently asked(5)

What is CVE-2026-65600?
CVE-2026-65600 is a medium vulnerability published on July 22, 2026. Traefik versions <= v2.11.51, >= v3.6.0 <= v3.6.22, and >= v3.7.0 <= v3.7.6 contain an authentication bypass via path traversal in the ReplacePathRegex middleware. When ReplacePathRegex is configured with a regex that captures user-controlled path segments without a mandatory path separator (e.g.…
When was CVE-2026-65600 disclosed?
CVE-2026-65600 was first published in the National Vulnerability Database on July 22, 2026, with the most recent update on August 6, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-65600 actively exploited?
CVE-2026-65600 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 64.8% of all scored CVEs.
What is the CVSS score of CVE-2026-65600?
CVE-2026-65600 has a CVSS v3 base score of 5.3 (NVD).
How do I remediate CVE-2026-65600?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-65600, 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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