CVE-2026-71327

HIGHNVD 8.18.1—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.1 under NVD CVSS v3. EPSS exploit probability: 0.5% (39th percentile of EPSS-scored CVEs). 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
8.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 8.1Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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
8.1HIGHmedium confidence
EG Risk
37
EG Risk 37/100CISA SSVC

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%
CISA SSVC: Track at low or medium mission impact; Track* at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.5%
EPSS %ILE
39th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track* at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

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 rangeFix by version rangeDependents
github.com/traefik/traefik—
  • every version on: no fix on record
—
github.com/traefik/traefik/v2—
  • every version on: no fix on record
—
github.com/traefik/traefik/v3—
  • 3.0.0 up to 3.6.25: fixed in 3.6.25
  • 3.7.0 up to 3.7.10: fixed in 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 / 47× 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 104 total refreshes for this CVE.

  1. 2026-10-04 23:23 UTCEG score recompute
  2. 2026-10-04 23:22 UTCEPSS rescore
  3. 2026-10-04 05:50 UTCEG score recompute
  4. 2026-10-03 14:26 UTCEPSS rescore
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  1. 2026-09-18 19:28 UTCEPSS rescore
  2. 2026-09-18 00:57 UTCEG score recompute
  3. 2026-09-16 21:10 UTCEG score recompute▲ 0.50
  4. 2026-09-16 20:45 UTCNVD updateCVSS v3 → 8.1
  5. 2026-09-16 14:08 UTCEPSS rescore
  6. 2026-09-16 05:15 UTCEPSS rescore
  7. 2026-09-15 14:26 UTCEG score recompute
  8. 2026-09-15 03:12 UTCEPSS rescore
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  22. 2026-09-05 16:22 UTCEG score recompute
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  25. 2026-09-04 05:07 UTCEPSS rescore
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  27. 2026-09-02 14:12 UTCEPSS rescore
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  36. 2026-08-28 21:42 UTCEPSS rescore
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  39. 2026-08-26 14:47 UTCEPSS rescore
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  42. 2026-08-24 19:12 UTCEG score recompute
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  45. 2026-08-22 08:27 UTCEG score recompute
  46. 2026-08-21 23:49 UTCEPSS rescore
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  48. 2026-08-20 22:56 UTCEPSS rescore
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  50. 2026-08-19 17:04 UTCEPSS rescore
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  74. 2026-08-08 04:07 UTCEG score recompute
  75. 2026-08-07 16:23 UTCEG score recompute

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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 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 0.5% probability of exploitation in the next 30 days (39th percentile of EPSS-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?
A fix for CVE-2026-71327 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-71327 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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