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ETK-2026-4378Zero's internal tracking ID, independent of the CVE number.

ETK-2026-4378Zero's internal tracking ID, independent of the CVE number.

waiting for further signalsZero needs more public information before it can validate it.

GHSA-x5pf-cqh3-2gv8 ↗

no check availablenot proven exploitable
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/v3 >= v3.1.0, <= v3.7.17; >= v3.8.0-rc.1, <= v3.8.0-rc.1
fixed in v3.7.18, v3.8.0-rc.2
CWE-770 Allocation of Resources Without Limits or Throttling
ETK-2026-4378Zero's internal tracking ID, independent of the CVE number., no cve assigned
pkg:golang/github.com/traefik/traefik/v3
cvss8.7cna vendorCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
17h 17msince last run
22mAI analysisAnalysis: how long the AI spent reversing this signal.
timeline
0 = trigger signal
trigger signal +0hwaiting for further signals+17h10m
0
+12h
+24h
+36h

description

Traefik v3 deployments using the Compress middleware with zstd enabled are affected. An unauthenticated remote client can drive excessive memory use and cause a service crash by sustaining many concurrent slow-reading responses.

mitigation

Upgrade to Traefik v3.7.18 or later. Until upgrading, disable zstd in the Compress middleware to reduce exposure.

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

check
no
exploit
no
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.
–
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
22m
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

No artifact: an exploit or check was attempted but could not be produced at this moment.

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-2026-4378

{
  "etk_id": "ETK-2026-4378",
  "cve_id": null,
  "display_id": "ETK-2026-4378",
  "ghsa_id": "GHSA-x5pf-cqh3-2gv8",
  "euvd_id": null,
  "status": "published",
  "anchor_state": "awaiting_cve",
  "title": "Memory exhaustion in Traefik Compress middleware",
  "summary": "Traefik v3 deployments using the Compress middleware with zstd enabled are affected. An unauthenticated remote client can drive excessive memory use and cause a service crash by sustaining many concurrent slow-reading responses.",
  "mitigation": "Upgrade to Traefik v3.7.18 or later. Until upgrading, disable zstd in the Compress middleware to reduce exposure.",
  "vendor": "go",
  "product": "go:github.com/traefik/traefik/v3",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= v3.1.0, <= 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": [
    770
  ],
  "cvss_score": 8.7,
  "cvss_src": "cna_vendor",
  "cvss_vector": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
  "epss_score": null,
  "epss_percentile": null,
  "epss_asof": null,
  "automation": "deterministic",
  "check": false,
  "check_confidence_basis": null,
  "exploit": false,
  "pipeline_minutes": 21.5767273,
  "t0_at": null,
  "signals": {
    "trigger_signal": {
      "at": "2026-11-12T10:01:26+00:00",
      "days": -1.435902628773148,
      "is_lower_bound": true,
      "measured_at": "2026-11-13T20:29:08.058814+00:00",
      "url": "https://github.com/traefik/traefik/security/advisories/GHSA-x5pf-cqh3-2gv8"
    }
  }
}

published 2026-11-13 11:48Z
last change 2026-11-13 20:00Z

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