CVE-2026-105299

{
  "etk_id": "ETK-2026-2113",
  "cve_id": "CVE-2026-105299",
  "display_id": "CVE-2026-105299",
  "ghsa_id": "GHSA-r9g2-75m7-w9wg",
  "euvd_id": "EUVD-2026-104781",
  "status": "published",
  "anchor_state": "anchored",
  "title": "HTTP/1 hop-by-hop header handling flaw in Pingora",
  "summary": "Pingora before 0.9.0 can forward client-nominated Connection headers and related hop-by-hop headers on HTTP/1 upstream requests. An unauthenticated remote client may cause headers added by Pingora, such as trusted forwarding headers, to be removed and potentially bypass origin authorization when traffic passes through a downstream HTTP/1 intermediary that honors those headers.",
  "mitigation": "Upgrade Pingora to 0.9.0 or later and do not use HttpUpstreamRequestPolicy::preserve() where origins rely on headers added by Pingora. If upgrading is not immediately possible, remove the Connection header and every header it nominates before adding trusted headers in upstream_request_filter.",
  "vendor": "Cloudflare",
  "product": "https://github.com/cloudflare/pingora",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 0.1.0, < 0.9.0"
      ],
      "ecosystem": null,
      "fixed_versions": [
        "0.9.0"
      ],
      "package_name": "https://github.com/cloudflare/pingora",
      "purl": null
    }
  ],
  "cwes": null,
  "cvss_score": 8.7,
  "cvss_src": "cna_vendor",
  "cvss_vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N",
  "epss_score": 0.0034,
  "epss_percentile": 0.2547,
  "epss_asof": "2026-10-20",
  "automation": "deterministic",
  "check": false,
  "check_confidence_basis": null,
  "exploit": false,
  "pipeline_minutes": 22.718683283333334,
  "t0_at": "2026-10-20T01:07:12.767000+00:00",
  "signals": {
    "trigger_signal": {
      "at": "2026-10-20T01:07:12.767000+00:00",
      "days": 0,
      "is_lower_bound": false,
      "measured_at": "2026-10-20T01:07:12.767000+00:00",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-105299"
    }
  }
}