{
  "cveId": "CVE-2026-105280",
  "url": "https://patchblox.com/security/cve/CVE-2026-105280",
  "summary": "CVE-2026-105280 is fixed in erlang-hex on 1 platform by DEBIAN-CVE-2026-105280 (version 2.5.3-2), released October 24, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "erlang-hex: Improper Validation of Integrity Check Value vulnerability in hexpm hex allows a package mirror to substitute the tar...",
  "description": "Improper Validation of Integrity Check Value vulnerability in hexpm hex allows a package mirror to substitute the tarball that mix hex.package fetch PACKAGE VERSION --output - writes to standard output.  Hex compares a fetched tarball\u0027s inner and outer checksums with the repository\u0027s signed registry before writing it to a file or unpacking it. The standard output branch of mix hex.package fetch writes the bytes returned by Hex.SCM.fetch/3 without that comparison, and Hex.SCM.fetch/3 doesn\u0027t verify freshly downloaded tarballs itself. When a mirror configured with HEX_MIRROR_URL or mirror_url serves altered bytes, the command prints them and exits successfully, while the same fetch with --output FILE fails with a checksum mismatch.  Hex also prints diagnostics to standard output while the command runs: the body of a failed HTTP response from the update check or a registry fetch, and API warnings from the x-hex-message header. A mirror that answers one of those requests with an error whose body is a tar archive gets that archive written to standard output ahead of the verified tarball, so a pipeline that unpacks standard output extracts the mirror\u0027s files. This happens even when the checksum check then fails, because the archive is already on standard output.  This issue affects hex: from 0.20.2 before 2.5.2.",
  "published": "2026-10-12T16:17:02Z",
  "severity": "",
  "epss": 0.00211,
  "epssPercentile": 0.11349,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "erlang-hex",
      "release": "Debian 14",
      "fixedVersion": "2.5.3-2",
      "fix": "DEBIAN-CVE-2026-105280",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-105280",
      "released": "2026-10-24T13:25:57Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T13:31:49Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}