CVE-2026-57458

{
  "etk_id": "ETK-2026-1122",
  "cve_id": "CVE-2026-57458",
  "display_id": "CVE-2026-57458",
  "ghsa_id": "GHSA-v3p6-34mc-hj7v",
  "euvd_id": "EUVD-2026-95991",
  "status": "published",
  "anchor_state": "anchored",
  "title": "Vikunja scoped API token permission bypass",
  "summary": "Vikunja 2.3.0 does not preserve scoped API-token permissions when issuing OAuth-derived session credentials. An attacker who possesses a token allowed to authorize OAuth can obtain credentials for the same account that work beyond the token's assigned scope.",
  "mitigation": "Upgrade code.vikunja.io/api to version 2.4.0 or later. Restrict issuance and exposure of scoped API tokens until the update is complete.",
  "vendor": "go",
  "product": "go:code.vikunja.io/api",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        "= 2.3.0"
      ],
      "ecosystem": "go",
      "fixed_versions": [
        "2.4.0"
      ],
      "package_name": "code.vikunja.io/api",
      "purl": "pkg:golang/code.vikunja.io/api"
    }
  ],
  "cwes": null,
  "cvss_score": 8.1,
  "cvss_src": "cna_vendor",
  "cvss_vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N",
  "epss_score": 0.0027,
  "epss_percentile": 0.1734,
  "epss_asof": "2026-10-20",
  "automation": "deterministic",
  "check": true,
  "check_confidence_basis": "differential",
  "exploit": false,
  "pipeline_minutes": 18.96756158333333,
  "t0_at": "2026-10-09T20:46:29.356000+00:00",
  "signals": {
    "check": {
      "at": "2026-10-10T01:43:14.767304+00:00",
      "days": 0.20608114935185184,
      "is_lower_bound": false,
      "measured_at": "2026-10-09T20:46:29.356000+00:00",
      "url": null
    },
    "public_poc": {
      "at": "2026-10-09T20:40:28+00:00",
      "days": -0.0041823611111111115,
      "is_lower_bound": false,
      "measured_at": "2026-10-09T20:46:29.356000+00:00",
      "url": "https://github.com/advisories/GHSA-v3p6-34mc-hj7v"
    },
    "trigger_signal": {
      "at": "2026-10-09T20:46:29.356000+00:00",
      "days": 0,
      "is_lower_bound": false,
      "measured_at": "2026-10-09T20:46:29.356000+00:00",
      "url": "https://github.com/advisories/GHSA-v3p6-34mc-hj7v"
    }
  }
}