CVE-2026-76949

Что произошло

Authentication Bypass by Spoofing vulnerability in team-alembic ash_authentication allows an attacker who can plant a remember-me cookie in a victim's browser to replace that victim's authenticated session with one for the attacker's own account. AshAuthentication.Plug.Helpers.sign_in_using_remember_me/3 skips re-authenticating an already-signed-in visitor by checking the session for "_token", but store_in_session/2 writes that key only when require_token_presence_for_authentication? is enabled and otherwise writes the bare subject name. At the default setting the guard therefore reads a key that is never written, its already-signed-in branch is unreachable, and the remember-me sign-in runs on every request through the per-request browser pipeline plug. A planted remember-me cookie is consequently honoured even for a visitor holding a live authenticated session, so whatever the victim enters afterwards lands in data the attacker controls. The read path in authenticate_resource_from_session/4 selects the key correctly, so the guard and the reader disagree about which key holds the session. This issue affects ash_authentication: from 4.10.0 before 4.15.0 and from 5.0.0-rc.0 before 5.0.0-rc.14.

Что делать

dpkg-query -W -f='${Package}	${Version}\n'

rpm -qa --qf '%{NAME}\t%{VERSION}-%{RELEASE}\n'

Get-HotFix | Select-Object HotFixID, InstalledOn

Продукты и затронутые версии

{
  "status": "affected",
  "version": "4.10.0",
  "lessThan": "4.15.0",
  "versionType": "semver"
}

{
  "status": "affected",
  "version": "5.0.0-rc.0",
  "lessThan": "5.0.0-rc.14",
  "versionType": "semver"
}

cpe:2.3:a:team-alembic:ash_authentication:*:*:*:*:*:*:*:*

{
  "status": "affected",
  "changes": [
    {
      "at": "b9568a53b438247238b1c5a4f49c8d84650f4bba",
      "status": "unaffected"
    },
    {
      "at": "9a34136b844abe179da1075067cf2835c64dcc12",
      "status": "unaffected"
    }
  ],
  "version": "3d3de314692558d06ec13945f857f00514e95a8c",
  "lessThan": "*",
  "versionType": "git"
}

cpe:2.3:a:team-alembic:ash_authentication:*:*:*:*:*:*:*:*

CVSS: оценки и векторы

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

Источники и ссылки

{
  "cwes": [
    "cve"
  ],
  "epss": {
    "source": "epss",
    "received_at": "2026-11-06T21:15:31.462682+00:00"
  },
  "title": {
    "source": "cve",
    "received_at": "2026-10-28T21:08:54.727363+00:00"
  },
  "scores": [
    "cve"
  ],
  "status": {
    "source": "cve",
    "received_at": "2026-10-28T21:08:54.727363+00:00"
  },
  "affected": [
    "cve"
  ],
  "published": {
    "source": "cve",
    "received_at": "2026-10-28T21:08:54.727363+00:00"
  },
  "solutions": [],
  "percentile": {
    "source": "epss",
    "received_at": "2026-11-06T21:15:31.462682+00:00"
  },
  "references": [
    "cve"
  ],
  "description": {
    "source": "cve",
    "received_at": "2026-10-28T21:08:54.727363+00:00"
  },
  "workarounds": [
    "cve"
  ],
  "configurations": []
}

Хронология записи

1. Данные обновлены07.11.2026, 00:15
2. Данные обновлены06.11.2026, 00:16
3. Данные обновлены05.11.2026, 00:19
4. Данные обновлены04.11.2026, 00:15
5. Данные обновлены03.11.2026, 00:14
6. Данные обновлены02.11.2026, 00:12
7. Данные обновлены31.10.2026, 11:59
8. Данные обновлены29.10.2026, 12:41
9. Появились сведения об исправлении29.10.2026, 00:08

Личная заметка и статус

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