{
  "schemaVersion": 1,
  "attribution": [
    {
      "source": "CISA Known Exploited Vulnerabilities",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "licence": "US government work"
    },
    {
      "source": "GitHub Advisory Database",
      "url": "https://github.com/advisories",
      "licence": "CC BY 4.0"
    },
    {
      "source": "Have I Been Pwned",
      "url": "https://haveibeenpwned.com/",
      "licence": "CC BY 4.0"
    },
    {
      "source": "CVE Program (CVE records)",
      "url": "https://www.cve.org/Legal/TermsOfUse",
      "licence": "CVE Terms of Use",
      "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.",
      "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy."
    },
    {
      "source": "FIRST EPSS",
      "url": "https://www.first.org/epss/",
      "licence": "free to use; FIRST requests attribution"
    }
  ],
  "record": {
    "id": "CVE-2026-82759",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-82759",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-09-17T13:08:21.929Z",
    "updatedAt": "2026-09-17T18:19:18.209Z",
    "importedAt": "2026-10-24T01:58:30.346Z",
    "snapshot": {
      "id": "cve_2026-10-24_midnight_baseline",
      "at": "2026-10-24T00:00:00.000Z",
      "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z"
    },
    "facts": {
      "title": "Reversible IP address pseudonymisation in AshAuthentication audit log hash mode",
      "summary": "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.\n\nAshAuthentication.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.\n\nThis 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.",
      "affected": [
        {
          "vendor": "team-alembic",
          "product": "ash_authentication",
          "packageName": "ash_authentication",
          "collectionURL": "https://repo.hex.pm",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "4.12.0",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "4.15.0"
            },
            {
              "version": "5.0.0-rc.0",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "5.0.0-rc.14"
            }
          ]
        },
        {
          "vendor": "team-alembic",
          "product": "ash_authentication",
          "packageName": "team-alembic/ash_authentication",
          "collectionURL": "https://github.com",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "255cfc9c0e511b7e0de39f8b3d676ae994fae06c",
              "status": "affected",
              "versionType": "git",
              "lessThan": "*",
              "changes": [
                {
                  "at": "d8a9c4b6bde828fdc8346198d5e4f588b5937541",
                  "status": "unaffected"
                },
                {
                  "at": "c3a6d5fe0d4fd383ea81b0402db0a96638479478",
                  "status": "unaffected"
                }
              ]
            }
          ]
        }
      ]
    }
  }
}