ETK-2026-2775Zero's internal tracking ID, independent of the CVE number.

{
  "etk_id": "ETK-2026-2775",
  "cve_id": null,
  "display_id": "ETK-2026-2775",
  "ghsa_id": "GHSA-23g4-vqq8-5764",
  "euvd_id": null,
  "status": "published",
  "anchor_state": "awaiting_cve",
  "title": "CAPTCHA replay enables access-code guessing in Siyuan kernel",
  "summary": "Siyuan kernel versions before v3.8.9 can retain a solved CAPTCHA in an older signed login cookie after the challenge is replaced. An unauthenticated attacker able to solve one CAPTCHA can reuse it while attempting workspace access codes; a successful guess creates an administrator session.",
  "mitigation": "Upgrade github.com/siyuan-note/siyuan/kernel to v3.8.9 or later.",
  "vendor": "go",
  "product": "go:github.com/siyuan-note/siyuan/kernel",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= v2.1.0"
      ],
      "ecosystem": "go",
      "fixed_versions": [
        "v3.8.9"
      ],
      "package_name": "github.com/siyuan-note/siyuan/kernel",
      "purl": "pkg:golang/github.com/siyuan-note/siyuan/kernel"
    }
  ],
  "cwes": [
    307
  ],
  "cvss_score": 7.4,
  "cvss_src": "cna_vendor",
  "cvss_vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N",
  "epss_score": null,
  "epss_percentile": null,
  "epss_asof": null,
  "automation": "contextual",
  "check": true,
  "check_confidence_basis": "assessed",
  "exploit": false,
  "pipeline_minutes": 56.87026778333333,
  "t0_at": null,
  "signals": {
    "check": {
      "at": "2026-10-27T16:22:26.230506+00:00",
      "days": -0.14490707586805557,
      "is_lower_bound": true,
      "measured_at": "2026-10-27T19:51:06.243164+00:00",
      "url": null
    },
    "trigger_signal": {
      "at": "2026-10-26T04:22:11+00:00",
      "days": -1.6450833548726853,
      "is_lower_bound": true,
      "measured_at": "2026-10-27T19:51:06.243164+00:00",
      "url": "https://github.com/siyuan-note/siyuan/security/advisories/GHSA-23g4-vqq8-5764"
    }
  }
}