CVE-2026-82759

Что произошло

Use of a One-Way Hash with a Predictable Salt vulnerability in team-alembic AshAuthentication allows readers of the audit store to recover the client IP addresses that the audit log add-on's :hash privacy mode is meant to pseudonymise. AshAuthentication.AddOn.AuditLog.IpPrivacy.hash_ip/1 computes a single unkeyed :crypto.hash(:sha256, salt ip) and truncates the result to 16 hexadecimal characters. The salt is read from the :audit_log_ip_salt or :secret application config keys, and falls back to the constant "default-salt-change-in-production" published in the library source when neither is set, with nothing warning that the default is in use. The IPv4 space is only 2^32 values and SHA-256 is fast, so the whole hash table is precomputable and every stored value maps back to its source address. Truncating to 16 characters does not help, and even a configured salt leaves the hash cheap enough to enumerate once it leaks. This issue affects ash_authentication: from 4.12.0 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": "4.12.0",
  "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": "d8a9c4b6bde828fdc8346198d5e4f588b5937541",
      "status": "unaffected"
    },
    {
      "at": "c3a6d5fe0d4fd383ea81b0402db0a96638479478",
      "status": "unaffected"
    }
  ],
  "version": "255cfc9c0e511b7e0de39f8b3d676ae994fae06c",
  "lessThan": "*",
  "versionType": "git"
}

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

CVSS: оценки и векторы

CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

Источники и ссылки

{
  "cwes": [
    "cve"
  ],
  "epss": {
    "source": "epss",
    "received_at": "2026-11-04T21:20:23.913612+00:00"
  },
  "title": {
    "source": "cve",
    "received_at": "2026-10-28T20:22:33.365644+00:00"
  },
  "scores": [
    "cve"
  ],
  "status": {
    "source": "cve",
    "received_at": "2026-10-28T20:22:33.365644+00:00"
  },
  "affected": [
    "cve"
  ],
  "published": {
    "source": "cve",
    "received_at": "2026-10-28T20:22:33.365644+00:00"
  },
  "solutions": [],
  "percentile": {
    "source": "epss",
    "received_at": "2026-11-04T21:20:23.913612+00:00"
  },
  "references": [
    "cve"
  ],
  "description": {
    "source": "cve",
    "received_at": "2026-10-28T20:22:33.365644+00:00"
  },
  "workarounds": [],
  "configurations": []
}

Хронология записи

1. Данные обновлены05.11.2026, 00:20
2. Данные обновлены04.11.2026, 00:15
3. Данные обновлены03.11.2026, 00:14
4. Данные обновлены02.11.2026, 00:12
5. Данные обновлены31.10.2026, 11:59
6. Данные обновлены29.10.2026, 12:43
7. Появились сведения об исправлении28.10.2026, 23:22

Личная заметка и статус

Другие CVE того же продукта