CVE-2026-71327

HIGHNVD 8.18.1—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.1 under NVD CVSS v3. EPSS exploit probability: 0.4%, top 71% 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
8.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.1Exploit: None knownExposed: 0

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

Traefik is an open source HTTP reverse proxy and load balancer. From 3.0.0 until 3.6.25 and 3.7.10, Traefik's Kubernetes Gateway API provider in pkg/provider/kubernetes/gateway/httproute.go, grpcroute.go, tcproute.go, and tlsroute.go builds HTTPRoute, GRPCRoute, TCPRoute, and TLSRoute router and service identities by hyphen-concatenating namespace, route name, Gateway identity, entry point, and rule index, allowing colliding Routes to overwrite another namespace's backend. This issue is fixed in 3.6.25 and 3.7.10.

CVSS v3
8.1
EG Score
8.1(medium)
EG Risk
37(Track)
EG Risk 37/100SSVC: 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
Severity81% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
29%
KEV
Not listed

Published

August 6, 2026

Last Modified

September 16, 2026

Advisory Details (5)

Auto-updated Aug 6, 2026
🔬 Proof of concept available. Patch available. Sources: github_commit, github_pr, github_release, github.
github Patch Available🟡 PoC Available

Gateway API route identity collision allows cross-namespace backend hijacking · Advisory · traefik/traefik · GitHub

https://github.com/traefik/traefik/security/advisories/GHSA-fgjj-px3w-67xx
github_release Patch Available

v3.7.10

Patch available: traefik/traefik v3.7.10

https://github.com/traefik/traefik/releases/tag/v3.7.10
github_release Patch Available

v3.6.25

Patch available: traefik/traefik v3.6.25

https://github.com/traefik/traefik/releases/tag/v3.6.25
github_pr

Avoid router name collisions in Kubernetes Gateway API provider

Fix merged in traefik/traefik PR #13580 on 2026-07-29 — awaiting tagged release

https://github.com/traefik/traefik/pull/13580
github_commit

commit a764166656f0 (traefik/traefik)

Fix landed in traefik/traefik commit a764166656f0 — awaiting tagged release

https://github.com/traefik/traefik/commit/a764166656f0cd337f917ac76315c381cca844f9

Vendor Advisories for CVE-2026-71327(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—3.7.10—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 12× in last 7d / 49× 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. 2026-09-19 01:10 UTCEG score recompute
  2. 2026-09-18 19:28 UTCEPSS rescore
  3. 2026-09-18 00:57 UTCEG score recompute
  4. 2026-09-16 21:10 UTCEG score recompute▲ 0.50
  5. 2026-09-16 20:45 UTCNVD updateCVSS v3 → 8.1
  6. 2026-09-16 14:08 UTCEPSS rescore
  7. 2026-09-16 05:15 UTCEPSS rescore
  8. 2026-09-15 14:26 UTCEG score recompute
  9. 2026-09-15 03:12 UTCEPSS rescore
  10. 2026-09-14 01:16 UTCEG score recompute
  11. 2026-09-13 01:48 UTCEG score recompute
  12. 2026-09-12 15:02 UTCEPSS rescore
  13. 2026-09-12 02:19 UTCEG score recompute
  14. 2026-09-11 14:53 UTCEPSS rescore
  15. 2026-09-11 14:32 UTCEG score recompute
  16. 2026-09-10 13:55 UTCEG score recompute
  17. 2026-09-10 09:35 UTCEPSS rescore
  18. 2026-09-09 09:05 UTCEG score recompute
  19. 2026-09-08 22:01 UTCEPSS rescore
  20. 2026-09-07 17:56 UTCEG score recompute
  21. 2026-09-06 15:52 UTCEG score recompute
  22. 2026-09-06 13:48 UTCEPSS rescore
  23. 2026-09-05 16:22 UTCEG score recompute
  24. 2026-09-05 03:31 UTCEG score recompute
  25. 2026-09-04 09:12 UTCEG score recompute
Show 55 more
  1. 2026-09-04 05:07 UTCEPSS rescore
  2. 2026-09-03 06:15 UTCEG score recompute
  3. 2026-09-02 14:12 UTCEPSS rescore
  4. 2026-09-01 18:13 UTCEG score recompute
  5. 2026-09-01 13:54 UTCEPSS rescore
  6. 2026-09-01 04:40 UTCEPSS rescore
  7. 2026-08-30 21:53 UTCEG score recompute
  8. 2026-08-30 19:17 UTCEPSS rescore
  9. 2026-08-30 10:09 UTCEG score recompute
  10. 2026-08-30 01:22 UTCEPSS rescore
  11. 2026-08-29 10:40 UTCEG score recompute
  12. 2026-08-28 21:42 UTCEPSS rescore
  13. 2026-08-27 19:51 UTCEG score recompute
  14. 2026-08-26 19:01 UTCEG score recompute
  15. 2026-08-26 14:47 UTCEPSS rescore
  16. 2026-08-25 18:42 UTCEG score recompute
  17. 2026-08-25 13:49 UTCEPSS rescore
  18. 2026-08-24 19:12 UTCEG score recompute
  19. 2026-08-23 07:55 UTCEG score recompute
  20. 2026-08-23 00:19 UTCEPSS rescore
  21. 2026-08-22 08:27 UTCEG score recompute
  22. 2026-08-21 23:49 UTCEPSS rescore
  23. 2026-08-21 08:59 UTCEG score recompute
  24. 2026-08-20 22:56 UTCEPSS rescore
  25. 2026-08-19 21:47 UTCEG score recompute
  26. 2026-08-19 17:04 UTCEPSS rescore
  27. 2026-08-18 22:17 UTCEG score recompute
  28. 2026-08-18 13:49 UTCEPSS rescore
  29. 2026-08-18 13:49 UTCEPSS rescore
  30. 2026-08-17 22:49 UTCEG score recompute
  31. 2026-08-17 13:47 UTCEPSS rescore
  32. 2026-08-16 23:20 UTCEG score recompute
  33. 2026-08-16 14:56 UTCEPSS rescore
  34. 2026-08-16 14:56 UTCEPSS rescore
  35. 2026-08-16 11:35 UTCEG score recompute
  36. 2026-08-16 02:15 UTCEPSS rescore
  37. 2026-08-15 12:08 UTCEG score recompute
  38. 2026-08-15 01:31 UTCEPSS rescore
  39. 2026-08-14 00:55 UTCEG score recompute
  40. 2026-08-13 22:00 UTCEPSS rescore
  41. 2026-08-13 01:27 UTCEG score recompute
  42. 2026-08-12 13:51 UTCEPSS rescore
  43. 2026-08-11 14:15 UTCEG score recompute
  44. 2026-08-11 02:31 UTCEG score recompute
  45. 2026-08-11 00:00 UTCEPSS rescore
  46. 2026-08-09 15:18 UTCEG score recompute
  47. 2026-08-09 13:47 UTCEPSS rescore
  48. 2026-08-09 03:35 UTCEG score recompute
  49. 2026-08-08 16:37 UTCEPSS rescore
  50. 2026-08-08 04:07 UTCEG score recompute
  51. 2026-08-07 16:23 UTCEG score recompute
  52. 2026-08-07 16:03 UTCEG score recompute
  53. 2026-08-06 22:38 UTCEG score recompute▼ 0.60
  54. 2026-08-06 22:37 UTCNVD updateCVSS v3 → 7.6 · CVSS v4 → 7.6
  55. 2026-08-06 17:07 UTCEG score recompute

Frequently asked(5)

What is CVE-2026-71327?
CVE-2026-71327 is a high vulnerability published on August 6, 2026. Traefik is an open source HTTP reverse proxy and load balancer. From 3.0.0 until 3.6.25 and 3.7.10, Traefik's Kubernetes Gateway API provider in pkg/provider/kubernetes/gateway/httproute.go, grpcroute.go, tcproute.go, and tlsroute.go builds HTTPRoute, GRPCRoute, TCPRoute, and TLSRoute router and…
When was CVE-2026-71327 disclosed?
CVE-2026-71327 was first published in the National Vulnerability Database on August 6, 2026, with the most recent update on September 16, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-71327 actively exploited?
CVE-2026-71327 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 71.1% of all scored CVEs.
What is the CVSS score of CVE-2026-71327?
CVE-2026-71327 has a CVSS v3 base score of 8.1 (NVD).
How do I remediate CVE-2026-71327?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-71327, 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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