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ETK-2026-3427Zero's internal tracking ID, independent of the CVE number.

ETK-2026-3427Zero's internal tracking ID, independent of the CVE number.

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

GHSA-r766-rf9f-588h ↗

no check availablenot proven exploitable
awaiting cvepublic pocExploit code has been published by someone. Source signals can also carry a PoC (Proof of Concept).−3h17mkevAttacks confirmed in the real world.
go:github.com/caddyserver/caddy/v2 <= 2.11.7
fixed in 2.11.8
CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
ETK-2026-3427Zero's internal tracking ID, independent of the CVE number., no cve assigned
pkg:golang/github.com/caddyserver/caddy/v2
cvss7.0ethiack provisional
3h 22msince last run
37mAI analysisAnalysis: how long the AI spent reversing this signal.
timeline
0 = cve.org, not yet published
waiting for further signals−3h22mtrigger signal −3h17mpublic poc−3h17m
−3h
−2h
−1h
0

description

Caddy deployments that construct a document root from the request host are affected. An unauthenticated remote client may cause files outside the intended site tree to be served, and may execute PHP files when PHP handling is configured; explicitly named-host sites are not affected.

mitigation

Upgrade github.com/caddyserver/caddy/v2 to version 2.11.8. Until upgraded, stop using request-host-derived document roots and restrict sites to explicit host names.

fixed in 2.11.8

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.
–
EPSSEstimate of the chance this CVE is exploited in the next 30 days. Refreshed daily.
–
agent run time
37m
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).
−3h17m
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. 2026-11-04 00:59Z
  2. 2026-11-04 00:59Z

this entry in the feed

GET /api/v1/feed/ETK-2026-3427

{
  "etk_id": "ETK-2026-3427",
  "cve_id": null,
  "display_id": "ETK-2026-3427",
  "ghsa_id": "GHSA-r766-rf9f-588h",
  "euvd_id": null,
  "status": "published",
  "anchor_state": "awaiting_cve",
  "title": "Host-controlled path traversal in Caddy",
  "summary": "Caddy deployments that construct a document root from the request host are affected. An unauthenticated remote client may cause files outside the intended site tree to be served, and may execute PHP files when PHP handling is configured; explicitly named-host sites are not affected.",
  "mitigation": "Upgrade github.com/caddyserver/caddy/v2 to version 2.11.8. Until upgraded, stop using request-host-derived document roots and restrict sites to explicit host names.",
  "vendor": "go",
  "product": "go:github.com/caddyserver/caddy/v2",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        "<= 2.11.7"
      ],
      "ecosystem": "go",
      "fixed_versions": [
        "2.11.8"
      ],
      "package_name": "github.com/caddyserver/caddy/v2",
      "purl": "pkg:golang/github.com/caddyserver/caddy/v2"
    }
  ],
  "cwes": [
    22
  ],
  "cvss_score": 7,
  "cvss_src": "ethiack_provisional",
  "cvss_vector": null,
  "epss_score": null,
  "epss_percentile": null,
  "epss_asof": null,
  "automation": "deterministic",
  "check": false,
  "check_confidence_basis": null,
  "exploit": false,
  "pipeline_minutes": 37.06578305,
  "t0_at": null,
  "signals": {
    "public_poc": {
      "at": "2026-11-04T00:59:13+00:00",
      "days": -0.13685046539351853,
      "is_lower_bound": true,
      "measured_at": "2026-11-04T04:16:16.939987+00:00",
      "url": "https://github.com/caddyserver/caddy/security/advisories/GHSA-r766-rf9f-588h"
    },
    "trigger_signal": {
      "at": "2026-11-04T00:59:13+00:00",
      "days": -0.13685046539351853,
      "is_lower_bound": true,
      "measured_at": "2026-11-04T04:16:16.939987+00:00",
      "url": "https://github.com/caddyserver/caddy/security/advisories/GHSA-r766-rf9f-588h"
    }
  }
}

published 2026-11-04 01:16Z
last change 2026-11-04 04:08Z

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