{
  "cveId": "CVE-2026-55520",
  "url": "https://patchblox.com/security/cve/CVE-2026-55520",
  "summary": "CVE-2026-55520 is fixed in python-protego on 1 platform by DEBIAN-CVE-2026-55520 (version 0.6.2\u002Bdfsg-1), released June 28, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "python-protego: Protego is a pure-Python robots.txt parser with support for modern conventions",
  "description": "Protego is a pure-Python robots.txt parser with support for modern conventions. Prior to 0.6.2, protego._urlpattern._URLPattern._prepare_pattern_for_regex translates every asterisk in an Allow or Disallow directive into a lazy regular-expression wildcard, so a directive containing many asterisks creates exponential backtracking. After protego.Protego.parse processes a crafted robots.txt file, protego.Protego.can_fetch can spend an attacker-controlled period matching a near-miss URL and deny service to the crawler. The vulnerable path is src/protego/_urlpattern.py in the _URLPattern match logic. This issue is fixed in version 0.6.2.",
  "published": "2026-08-28T20:18:28Z",
  "severity": "",
  "epss": 0.00511,
  "epssPercentile": 0.43845,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "python-protego",
      "release": "Debian 14",
      "fixedVersion": "0.6.2\u002Bdfsg-1",
      "fix": "DEBIAN-CVE-2026-55520",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-55520",
      "released": "2026-06-28T17:47:07Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-10T07:50:38Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}