CVE-2026-48020

CRITICALNVD 10.010.0—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 10.0 under NVD CVSS v3. EPSS exploit probability: 0.8%, top 46% 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
10.0EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 10.0Exploit: None knownExposed: 0

A fix is available — apply it.

Traefik is an HTTP reverse proxy and load balancer. Prior to 2.11.48, 3.6.19, and 3.7.3, there is a high severity vulnerability in Traefik's StripPrefix middleware that allows an unauthenticated attacker to bypass route-level authentication and authorization. When a public router matches on a PathPrefix rule and applies the StripPrefix middleware, a request path containing .. or its percent-encoded form %2e%2e can match the public route at routing time and then, after the prefix is stripped and the path is normalized, resolve to a path served by a separate, authenticated router. As a result, an attacker can reach protected backend paths — such as admin or internal configuration endpoints — without satisfying the authentication middleware attached to the protected router. This vulnerability is fixed in 2.11.48, 3.6.19, and 3.7.3.

CVSS v3
10.0
EG Score
10.0(medium)
EG Risk
60(Track)
EG Risk 60/100SSVC: 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
Severity100% × 45%
Exploitation1% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
54%
KEV
Not listed

Published

June 11, 2026

Last Modified

September 2, 2026

Advisory Details (8)

Auto-updated Sep 16, 2026
🔬 Proof of concept available. Patch available. Sources: redhat, github_release, github.
redhat Patch Available
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-48020.json
redhat

2491915 – (CVE-2026-48020) CVE-2026-48020 github.com/traefik/traefik: Traefik: Authentication bypass in StripPrefix middleware allows unauthorized access to protected paths

https://bugzilla.redhat.com/show_bug.cgi?id=2491915
redhat Patch Available

CVE-2026-48020 - Red Hat Customer Portal

Affected: Red Hat Enterprise Linux 8 or OpenShift Container Platform 4, is affected by this vulnerability and a fix may be released to a

https://access.redhat.com/security/cve/CVE-2026-48020
redhat Patch Available
https://access.redhat.com/errata/RHSA-2026:62260
github Patch Available🟡 PoC Available

Traefik StripPrefix Route-Level Auth Bypass via Path Normalization · Advisory · traefik/traefik · GitHub

https://github.com/traefik/traefik/security/advisories/GHSA-xf64-8mw2-4gr2
github_release Patch Available

v3.7.3

Patch available: traefik/traefik v3.7.3

https://github.com/traefik/traefik/releases/tag/v3.7.3
github_release Patch Available

v3.6.19

Patch available: traefik/traefik v3.6.19

https://github.com/traefik/traefik/releases/tag/v3.6.19
github_release Patch Available

v2.11.48

Patch available: traefik/traefik v2.11.48

https://github.com/traefik/traefik/releases/tag/v2.11.48

Vendor Advisories for CVE-2026-48020(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—2.11.48—
github.com/traefik/traefik/v3—3.7.3—

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 31× 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. 2026-09-18 19:28 UTCEPSS rescore
  2. 2026-09-16 14:08 UTCEPSS rescore
  3. 2026-09-16 05:15 UTCEPSS rescore
  4. 2026-09-14 08:35 UTCVendor advisory
  5. 2026-09-14 04:10 UTCEG score recompute
  6. 2026-09-14 04:10 UTCVendor advisory
  7. 2026-09-13 16:47 UTCEPSS rescore
  8. 2026-09-11 14:53 UTCEPSS rescore
  9. 2026-09-10 09:35 UTCEPSS rescore
  10. 2026-09-08 22:01 UTCEPSS rescore
  11. 2026-09-07 16:01 UTCEPSS rescore
  12. 2026-09-06 13:47 UTCEPSS rescore
  13. 2026-09-04 05:06 UTCEPSS rescore
  14. 2026-09-02 14:12 UTCEPSS rescore
  15. 2026-09-02 13:37 UTCVendor advisory
  16. 2026-09-02 12:38 UTCEG score recompute
  17. 2026-09-02 12:38 UTCVendor advisory
  18. 2026-09-01 13:54 UTCEPSS rescore
  19. 2026-08-31 00:05 UTCEG score recompute
  20. 2026-08-30 19:17 UTCEPSS rescore
  21. 2026-08-30 01:22 UTCEPSS rescore
  22. 2026-08-28 21:41 UTCEPSS rescore
  23. 2026-08-27 14:25 UTCEPSS rescore
  24. 2026-08-26 14:46 UTCEPSS rescore
  25. 2026-08-25 13:49 UTCEPSS rescore
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  1. 2026-08-25 00:05 UTCEG score recompute
  2. 2026-08-23 10:43 UTCEG score recompute
  3. 2026-08-23 00:19 UTCEPSS rescore
  4. 2026-08-21 23:49 UTCEPSS rescore
  5. 2026-08-21 02:08 UTCEG score recompute
  6. 2026-08-20 22:55 UTCEPSS rescore
  7. 2026-08-20 08:51 UTCEG score recompute
  8. 2026-08-19 17:04 UTCEPSS rescore
  9. 2026-08-19 14:54 UTCEG score recompute
  10. 2026-08-18 13:48 UTCEPSS rescore
  11. 2026-08-17 13:47 UTCEPSS rescore
  12. 2026-08-16 23:06 UTCEG score recompute
  13. 2026-08-16 14:56 UTCEPSS rescore
  14. 2026-08-16 04:31 UTCEG score recompute
  15. 2026-08-16 02:14 UTCEPSS rescore
  16. 2026-08-15 05:01 UTCEG score recompute
  17. 2026-08-15 01:30 UTCEPSS rescore
  18. 2026-08-13 22:14 UTCEG score recompute
  19. 2026-08-13 22:00 UTCEPSS rescore
  20. 2026-08-12 16:00 UTCEG score recompute
  21. 2026-08-12 13:51 UTCEPSS rescore
  22. 2026-08-11 17:58 UTCEG score recompute
  23. 2026-08-11 00:19 UTCEG score recompute
  24. 2026-08-11 00:00 UTCEPSS rescore
  25. 2026-08-09 17:25 UTCEG score recompute
  26. 2026-08-09 13:46 UTCEPSS rescore
  27. 2026-08-08 19:27 UTCEG score recompute
  28. 2026-08-08 16:37 UTCEPSS rescore
  29. 2026-08-07 17:02 UTCEG score recompute
  30. 2026-08-06 17:57 UTCEG score recompute
  31. 2026-08-06 13:47 UTCEPSS rescore
  32. 2026-08-05 19:59 UTCEG score recompute
  33. 2026-08-05 19:17 UTCEPSS rescore
  34. 2026-08-04 15:51 UTCEG score recompute
  35. 2026-08-04 15:10 UTCEPSS rescore
  36. 2026-08-04 10:39 UTCEPSS rescore
  37. 2026-08-03 14:49 UTCEG score recompute
  38. 2026-08-03 10:36 UTCEPSS rescore
  39. 2026-08-02 03:09 UTCEG score recompute
  40. 2026-08-02 02:27 UTCEPSS rescore
  41. 2026-08-01 09:33 UTCEG score recompute
  42. 2026-08-01 04:16 UTCEPSS rescore
  43. 2026-07-31 00:40 UTCEG score recompute
  44. 2026-07-30 16:28 UTCEPSS rescore
  45. 2026-07-30 09:41 UTCEG score recompute
  46. 2026-07-30 01:30 UTCEPSS rescore
  47. 2026-07-29 04:53 UTCEG score recompute
  48. 2026-07-28 15:37 UTCEPSS rescore
  49. 2026-07-27 18:20 UTCEG score recompute
  50. 2026-07-26 20:54 UTCEG score recompute
  51. 2026-07-26 14:54 UTCEPSS rescore
  52. 2026-07-25 14:18 UTCEPSS rescore
  53. 2026-07-24 14:18 UTCEPSS rescore
  54. 2026-07-23 14:18 UTCEPSS rescore
  55. 2026-07-23 03:18 UTCEG score recompute
  56. 2026-07-22 14:08 UTCEPSS rescore
  57. 2026-07-21 15:24 UTCEPSS rescore
  58. 2026-07-20 17:08 UTCEPSS rescore
  59. 2026-07-19 14:31 UTCEPSS rescore
  60. 2026-07-19 02:29 UTCEPSS rescore
  61. 2026-07-18 10:04 UTCEPSS rescore
  62. 2026-07-16 17:03 UTCEPSS rescore
  63. 2026-07-15 16:57 UTCEPSS rescore
  64. 2026-07-15 07:58 UTCEG score recompute▲ 0.90
  65. 2026-07-15 02:26 UTCNVD updateCVSS v3 → 10
  66. 2026-07-15 02:00 UTCEPSS rescore
  67. 2026-07-15 01:43 UTCEG score recompute▼ 0.90
  68. 2026-07-15 01:21 UTCMITRE cvelistV5CVSS v3 → 9.1
  69. 2026-07-13 22:30 UTCEPSS rescore
  70. 2026-07-13 06:13 UTCEPSS rescore
  71. 2026-07-12 05:46 UTCEPSS rescore
  72. 2026-07-11 08:27 UTCEPSS rescore
  73. 2026-07-09 19:10 UTCEPSS rescore
  74. 2026-07-08 15:16 UTCEPSS rescore
  75. 2026-07-07 13:46 UTCEPSS rescore

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-48020?
CVE-2026-48020 is a critical vulnerability published on June 11, 2026. Traefik is an HTTP reverse proxy and load balancer. Prior to 2.11.48, 3.6.19, and 3.7.3, there is a high severity vulnerability in Traefik's StripPrefix middleware that allows an unauthenticated attacker to bypass route-level authentication and authorization. When a public router matches on a…
When was CVE-2026-48020 disclosed?
CVE-2026-48020 was first published in the National Vulnerability Database on June 11, 2026, with the most recent update on September 2, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-48020 actively exploited?
CVE-2026-48020 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 45.8% of all scored CVEs.
What is the CVSS score of CVE-2026-48020?
CVE-2026-48020 has a CVSS v3 base score of 10.0 (NVD).
How do I remediate CVE-2026-48020?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-48020, 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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