CVE-2026-65602

HIGHNVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.8 under NVD CVSS v3. EPSS exploit probability: 0.2%, top 92% 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
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.8Exploit: None knownExposed: 0

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

Traefik 3.6.0 through 3.6.22 and 3.7.0 through 3.7.6 fail to enforce the crossProviderNamespaces allowlist for IngressRouteTCP service serversTransport references (the allowlist was only enforced for HTTP serversTransport references). A low-privileged Kubernetes user in a namespace not listed in crossProviderNamespaces can set serversTransport: foo@file on an IngressRouteTCP service, causing Traefik to accept the forbidden cross-provider reference and use a file-provider TCPServersTransport — including privileged backend mTLS client certificates, SPIFFE identity, or PROXY-protocol settings. This is fixed in 3.6.23 and 3.7.7.

CVSS v3
8.8
EG Score
8.8(medium)
EG Risk
40(Track)
EG Risk 40/100SSVC: 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
Severity88% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
8%
KEV
Not listed

Published

July 22, 2026

Last Modified

August 6, 2026

Advisory Details (3)

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

Traefik before 3.6.23 IngressRouteTCP ServersTransport Namespace Bypass | Advisories | VulnCheck

https://www.vulncheck.com/advisories/traefik-before-ingressroutetcp-serverstransport-namespace-bypass
github_commit

commit 26c96a3935ca (traefik/traefik)

Fix landed in traefik/traefik commit 26c96a3935ca — awaiting tagged release

https://github.com/traefik/traefik/commit/26c96a3935cafb473f4a5bae1886560d9aa4e4f0
github Patch Available🟡 PoC Available

Traefik CRD IngressRouteTCP ServersTransport Cross-Provider Namespace Bypass · Advisory · traefik/traefik · GitHub

https://github.com/traefik/traefik/security/advisories/GHSA-42cj-m3vj-89wv

Vendor Advisories for CVE-2026-65602(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———
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 9× in last 7d / 43× 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 249 total refreshes for this CVE.

  1. 2026-09-18 22:41 UTCEG score recompute
  2. 2026-09-18 19:28 UTCEPSS rescore
  3. 2026-09-18 03:11 UTCEG score recompute
  4. 2026-09-17 02:13 UTCEG score recompute
  5. 2026-09-16 14:08 UTCEPSS rescore
  6. 2026-09-16 07:05 UTCEG score recompute
  7. 2026-09-16 05:15 UTCEPSS rescore
  8. 2026-09-13 22:26 UTCEG score recompute
  9. 2026-09-12 20:56 UTCEG score recompute
  10. 2026-09-11 21:00 UTCEG score recompute
  11. 2026-09-11 14:53 UTCEPSS rescore
  12. 2026-09-11 09:37 UTCEPSS rescore
  13. 2026-09-10 21:40 UTCEG score recompute
  14. 2026-09-09 09:18 UTCEG score recompute
  15. 2026-09-08 22:01 UTCEPSS rescore
  16. 2026-09-07 21:43 UTCEG score recompute
  17. 2026-09-07 16:01 UTCEPSS rescore
  18. 2026-09-06 13:47 UTCEPSS rescore
  19. 2026-09-05 19:35 UTCEG score recompute
  20. 2026-09-05 15:31 UTCEPSS rescore
  21. 2026-09-05 07:16 UTCEG score recompute
  22. 2026-09-04 13:56 UTCEG score recompute
  23. 2026-09-04 05:07 UTCEPSS rescore
  24. 2026-09-02 14:12 UTCEPSS rescore
  25. 2026-09-01 23:41 UTCEG score recompute
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  1. 2026-09-01 13:54 UTCEPSS rescore
  2. 2026-09-01 04:40 UTCEPSS rescore
  3. 2026-08-31 00:24 UTCEG score recompute
  4. 2026-08-30 19:17 UTCEPSS rescore
  5. 2026-08-30 12:45 UTCEG score recompute
  6. 2026-08-30 01:22 UTCEPSS rescore
  7. 2026-08-30 00:56 UTCEG score recompute
  8. 2026-08-28 21:42 UTCEPSS rescore
  9. 2026-08-27 21:59 UTCEG score recompute
  10. 2026-08-26 19:58 UTCEG score recompute
  11. 2026-08-26 14:47 UTCEPSS rescore
  12. 2026-08-25 17:49 UTCEG score recompute
  13. 2026-08-25 13:49 UTCEPSS rescore
  14. 2026-08-24 18:15 UTCEG score recompute
  15. 2026-08-22 07:05 UTCEG score recompute
  16. 2026-08-21 23:49 UTCEPSS rescore
  17. 2026-08-21 07:45 UTCEG score recompute
  18. 2026-08-20 22:56 UTCEPSS rescore
  19. 2026-08-19 20:45 UTCEG score recompute
  20. 2026-08-19 17:04 UTCEPSS rescore
  21. 2026-08-18 20:34 UTCEG score recompute
  22. 2026-08-18 13:48 UTCEPSS rescore
  23. 2026-08-17 20:28 UTCEG score recompute
  24. 2026-08-17 13:47 UTCEPSS rescore
  25. 2026-08-16 20:23 UTCEG score recompute
  26. 2026-08-16 14:56 UTCEPSS rescore
  27. 2026-08-16 08:43 UTCEG score recompute
  28. 2026-08-15 09:23 UTCEG score recompute
  29. 2026-08-15 01:30 UTCEPSS rescore
  30. 2026-08-13 22:24 UTCEG score recompute
  31. 2026-08-13 22:00 UTCEPSS rescore
  32. 2026-08-12 23:05 UTCEG score recompute
  33. 2026-08-12 13:51 UTCEPSS rescore
  34. 2026-08-11 23:46 UTCEG score recompute
  35. 2026-08-11 00:27 UTCEG score recompute
  36. 2026-08-11 00:00 UTCEPSS rescore
  37. 2026-08-10 01:08 UTCEG score recompute
  38. 2026-08-09 13:47 UTCEPSS rescore
  39. 2026-08-09 01:49 UTCEG score recompute
  40. 2026-08-08 16:37 UTCEPSS rescore
  41. 2026-08-08 02:29 UTCEG score recompute
  42. 2026-08-06 15:29 UTCEG score recompute▲ 3.50
  43. 2026-08-06 15:26 UTCNVD updateCVSS v3 → 8.8 · severity → HIGH
  44. 2026-08-06 13:47 UTCEPSS rescore
  45. 2026-08-06 04:57 UTCEG score recompute
  46. 2026-08-05 19:17 UTCEPSS rescore
  47. 2026-08-05 19:17 UTCEPSS rescore
  48. 2026-08-05 04:51 UTCEG score recompute
  49. 2026-08-05 04:51 UTCGHSA enrichment
  50. 2026-08-04 15:10 UTCEPSS rescore
  51. 2026-08-04 10:39 UTCEPSS rescore
  52. 2026-08-04 04:40 UTCEG score recompute
  53. 2026-08-04 04:40 UTCGHSA enrichment
  54. 2026-08-03 10:36 UTCEPSS rescore
  55. 2026-08-03 04:34 UTCGHSA enrichment
  56. 2026-08-02 04:27 UTCEG score recompute
  57. 2026-08-02 04:27 UTCGHSA enrichment
  58. 2026-08-02 02:27 UTCEPSS rescore
  59. 2026-08-01 04:21 UTCEG score recompute
  60. 2026-08-01 04:21 UTCGHSA enrichment
  61. 2026-08-01 04:16 UTCEPSS rescore
  62. 2026-07-31 04:09 UTCEG score recompute
  63. 2026-07-31 04:09 UTCGHSA enrichment
  64. 2026-07-30 16:28 UTCEPSS rescore
  65. 2026-07-30 03:58 UTCEG score recompute
  66. 2026-07-30 03:58 UTCGHSA enrichment
  67. 2026-07-30 01:30 UTCEPSS rescore
  68. 2026-07-29 03:52 UTCEG score recompute
  69. 2026-07-29 03:52 UTCGHSA enrichment
  70. 2026-07-28 15:37 UTCEPSS rescore
  71. 2026-07-28 03:43 UTCEG score recompute
  72. 2026-07-28 03:43 UTCGHSA enrichment
  73. 2026-07-27 14:14 UTCEPSS rescore
  74. 2026-07-27 03:37 UTCEG score recompute
  75. 2026-07-27 03:36 UTCGHSA enrichment

Frequently asked(5)

What is CVE-2026-65602?
CVE-2026-65602 is a high vulnerability published on July 22, 2026. Traefik 3.6.0 through 3.6.22 and 3.7.0 through 3.7.6 fail to enforce the crossProviderNamespaces allowlist for IngressRouteTCP service serversTransport references (the allowlist was only enforced for HTTP serversTransport references). A low-privileged Kubernetes user in a namespace not listed in…
When was CVE-2026-65602 disclosed?
CVE-2026-65602 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-2026-65602 actively exploited?
CVE-2026-65602 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 91.6% of all scored CVEs.
What is the CVSS score of CVE-2026-65602?
CVE-2026-65602 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2026-65602?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-65602, 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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