CVE-2026-76949

{
  "etk_id": "ETK-2026-3855",
  "cve_id": "CVE-2026-76949",
  "display_id": "CVE-2026-76949",
  "ghsa_id": "GHSA-hh34-374j-pfr5",
  "euvd_id": "EUVD-2026-82578",
  "status": "published",
  "anchor_state": "anchored",
  "title": "Remember-me authentication bypass in ash_authentication",
  "summary": "ash_authentication 4.10.0 through 4.14.2 and 5.0.0-rc.0 through 5.0.0-rc.13 can accept a forged remember-me state over an existing authenticated session. An attacker able to place a cookie in a victim's browser can switch the victim into the attacker's account when remember-me is enabled in the browser pipeline and token presence is not required.",
  "mitigation": "Upgrade 4.x deployments to 4.15.0 or 5.0 release-candidate deployments to 5.0.0-rc.14. Until upgrading, require token presence for authentication where supported, or remove the remember-me plug from the browser pipeline.",
  "vendor": "erlang",
  "product": "ash_authentication",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 4.10.0, <= 4.14.2"
      ],
      "ecosystem": "erlang",
      "fixed_versions": [
        "4.15.0"
      ],
      "package_name": "ash_authentication",
      "purl": "pkg:hex/ash_authentication"
    },
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 5.0.0-rc.0, <= 5.0.0-rc.13"
      ],
      "ecosystem": "erlang",
      "fixed_versions": [
        "5.0.0-rc.14"
      ],
      "package_name": "ash_authentication",
      "purl": "pkg:hex/ash_authentication"
    }
  ],
  "cwes": [
    290
  ],
  "cvss_score": 9.1,
  "cvss_src": "cna_vendor",
  "cvss_vector": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N",
  "epss_score": null,
  "epss_percentile": null,
  "epss_asof": null,
  "automation": "contextual",
  "check": true,
  "check_confidence_basis": "assessed",
  "exploit": false,
  "pipeline_minutes": 43.86381793333333,
  "t0_at": "2026-09-17T21:57:50.146000+00:00",
  "signals": {
    "check": {
      "at": "2026-11-07T18:56:52.350378+00:00",
      "days": 50.874331069189815,
      "is_lower_bound": false,
      "measured_at": "2026-09-17T21:57:50.146000+00:00",
      "url": null
    },
    "trigger_signal": {
      "at": "2026-09-17T21:57:50.146000+00:00",
      "days": 0,
      "is_lower_bound": false,
      "measured_at": "2026-09-17T21:57:50.146000+00:00",
      "url": "https://github.com/team-alembic/ash_authentication/security/advisories/GHSA-hh34-374j-pfr5"
    }
  }
}