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ETK-2026-4379Zero's internal tracking ID, independent of the CVE number.

ETK-2026-4379Zero's internal tracking ID, independent of the CVE number.

validatedZero produced an exploit or a check.

GHSA-cp28-5662-543f ↗

check availableZero validated a working check for it.proven exploitableZero has validated a full working exploit.
awaiting cvepublic pocExploit code has been published by someone. Source signals can also carry a PoC (Proof of Concept).kevAttacks confirmed in the real world.
go:github.com/traefik/traefik/v2 <= v2.11.61; >= v3.0.0, <= v3.7.17; >= v3.8.0-rc.1, <= v3.8.0-rc.1
fixed in v2.11.62, v3.7.18, v3.8.0-rc.2
CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
ETK-2026-4379Zero's internal tracking ID, independent of the CVE number., no cve assigned
pkg:golang/github.com/traefik/traefik/v2
pkg:golang/github.com/traefik/traefik/v3
cvss7.8cna vendorCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:L/SA:N
−17h26mTTV
13mAI analysisAnalysis: how long the AI spent reversing this signal.
Check if you are vulnerable
timeline
0 = cve.org, not yet published
trigger signal −1.8dcheck + exploit−0.7d
−1d
0

description

Affected Traefik deployments can route a path containing parameterized dot-segments without fully normalizing it. An unauthenticated requester may reach protected backend resources when authenticated and unauthenticated routes share a backend that removes path parameters.

mitigation

Upgrade Traefik v2 to v2.11.62 or later, or v3 to v3.7.18 or later; v3.8 users can use v3.8.0-rc.2 or later. Move deployments on end-of-life v3.0–v3.6 to a patched release line.

fixed in v2.11.62, v3.7.18, v3.8.0-rc.2

check
available
exploit
yes
automationDeterministic: a check that runs on its own, the same request on every target. Contextual: an agentic technique that needs to be applied per target, for bugs that depend on contextual flows.
deterministic
auth requiredWhether an attacker needs an account first, based on the CVSS vector's Privileges Required.
no
EPSSEstimate of the chance this CVE is exploited in the next 30 days. Refreshed daily.
–
agent run time
13m
cve.org record, t = 0The moment cve.org publishes the CVE in full.
not published yet
Δ to public pocExploit code has been published by someone. Source signals can also carry a PoC (Proof of Concept).
–
Δ to kevAttacks confirmed in the real world.
–

outcome

Differential: the exploit fired on the vulnerable build and stayed silent on the patched one.

source signals

Public signals that triggered or updated the pipeline. These are inputs for the deltas above.

  1. 2026-11-12 10:01Z

this entry in the feed

GET /api/v1/feed/ETK-2026-4379

{
  "etk_id": "ETK-2026-4379",
  "cve_id": null,
  "display_id": "ETK-2026-4379",
  "ghsa_id": "GHSA-cp28-5662-543f",
  "euvd_id": null,
  "status": "published",
  "anchor_state": "awaiting_cve",
  "title": "Path normalization authorization bypass in Traefik",
  "summary": "Affected Traefik deployments can route a path containing parameterized dot-segments without fully normalizing it. An unauthenticated requester may reach protected backend resources when authenticated and unauthenticated routes share a backend that removes path parameters.",
  "mitigation": "Upgrade Traefik v2 to v2.11.62 or later, or v3 to v3.7.18 or later; v3.8 users can use v3.8.0-rc.2 or later. Move deployments on end-of-life v3.0–v3.6 to a patched release line.",
  "vendor": "go",
  "product": "go:github.com/traefik/traefik/v2",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        "<= v2.11.61"
      ],
      "ecosystem": "go",
      "fixed_versions": [
        "v2.11.62"
      ],
      "package_name": "github.com/traefik/traefik/v2",
      "purl": "pkg:golang/github.com/traefik/traefik/v2"
    },
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= v3.0.0, <= v3.7.17"
      ],
      "ecosystem": "go",
      "fixed_versions": [
        "v3.7.18"
      ],
      "package_name": "github.com/traefik/traefik/v3",
      "purl": "pkg:golang/github.com/traefik/traefik/v3"
    },
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= v3.8.0-rc.1, <= v3.8.0-rc.1"
      ],
      "ecosystem": "go",
      "fixed_versions": [
        "v3.8.0-rc.2"
      ],
      "package_name": "github.com/traefik/traefik/v3",
      "purl": "pkg:golang/github.com/traefik/traefik/v3"
    }
  ],
  "cwes": [
    22
  ],
  "cvss_score": 7.8,
  "cvss_src": "cna_vendor",
  "cvss_vector": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:L/SA:N",
  "epss_score": null,
  "epss_percentile": null,
  "epss_asof": null,
  "automation": "deterministic",
  "check": true,
  "check_confidence_basis": "differential",
  "exploit": true,
  "pipeline_minutes": 13.07047855,
  "t0_at": null,
  "signals": {
    "check": {
      "at": "2026-11-13T12:01:55.054972+00:00",
      "days": -0.7262953988888889,
      "is_lower_bound": true,
      "measured_at": "2026-11-14T05:27:47.028294+00:00",
      "url": null
    },
    "exploit": {
      "at": "2026-11-13T12:01:55.054972+00:00",
      "days": -0.7262953988888889,
      "is_lower_bound": true,
      "measured_at": "2026-11-14T05:27:47.028294+00:00",
      "url": null
    },
    "trigger_signal": {
      "at": "2026-11-12T10:01:23+00:00",
      "days": -1.8099997388425926,
      "is_lower_bound": true,
      "measured_at": "2026-11-14T05:27:47.028294+00:00",
      "url": "https://github.com/traefik/traefik/security/advisories/GHSA-cp28-5662-543f"
    }
  }
}

published 2026-11-13 11:48Z
last change 2026-11-14 05:26Z

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