ETK-2026-2211Zero's internal tracking ID, independent of the CVE number.

{
  "etk_id": "ETK-2026-2211",
  "cve_id": null,
  "display_id": "ETK-2026-2211",
  "ghsa_id": "GHSA-24cm-2vgv-fjj6",
  "euvd_id": null,
  "status": "published",
  "anchor_state": "awaiting_cve",
  "title": "Authorization-code redirect validation flaw in yamcs-core",
  "summary": "yamcs-core versions before 5.13.7 mishandle redirect destinations and authorization-code validation in the built-in login flow. An attacker can take over the session of a user who completes login through an attacker-supplied Yamcs login link, then use that user's API privileges. Exploitation requires persuading an already authenticated operator or other user to complete that login flow.",
  "mitigation": "Upgrade org.yamcs:yamcs-core to version 5.13.7 or later. Prioritize restricting access for high-privilege users until the upgrade is deployed.",
  "vendor": "maven",
  "product": "maven:org.yamcs:yamcs-core",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        "<= 5.13.6"
      ],
      "ecosystem": "maven",
      "fixed_versions": [
        "5.13.7"
      ],
      "package_name": "org.yamcs:yamcs-core",
      "purl": "pkg:maven/org.yamcs/yamcs-core"
    }
  ],
  "cwes": [
    287
  ],
  "cvss_score": 8.5,
  "cvss_src": "cna_vendor",
  "cvss_vector": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N",
  "epss_score": null,
  "epss_percentile": null,
  "epss_asof": null,
  "automation": "contextual",
  "check": false,
  "check_confidence_basis": null,
  "exploit": false,
  "pipeline_minutes": 30.841639083333334,
  "t0_at": null,
  "signals": {
    "public_poc": {
      "at": "2026-10-17T20:12:51+00:00",
      "days": -3.3346155415509258,
      "is_lower_bound": true,
      "measured_at": "2026-10-21T04:14:41.806081+00:00",
      "url": "https://github.com/yamcs/yamcs/security/advisories/GHSA-24cm-2vgv-fjj6"
    },
    "trigger_signal": {
      "at": "2026-10-17T20:12:51+00:00",
      "days": -3.3346155415509258,
      "is_lower_bound": true,
      "measured_at": "2026-10-21T04:14:41.806081+00:00",
      "url": "https://github.com/yamcs/yamcs/security/advisories/GHSA-24cm-2vgv-fjj6"
    }
  }
}