{
  "cveId": "CVE-2026-77639",
  "url": "https://patchblox.com/security/cve/CVE-2026-77639",
  "summary": "CVE-2026-77639 is fixed in tor on 1 platform, first by DEBIAN-CVE-2026-77639, released August 21, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "tor: Tor before 0.4.9.9 was prone to a\u00A0compression bomb bypass where an attacker could concatenate many gzip or zlib sub-s...",
  "description": "Tor before 0.4.9.9 was prone to a\u00A0compression bomb bypass where an attacker could concatenate many gzip or zlib sub-streams, each just under the per-stream detection threshold, to avoid the compression bomb check entirely. This is TROVE-2026-022.",
  "published": "2026-08-20T21:17:11Z",
  "severity": "medium",
  "cvss": 5.3,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
  "epss": 0.0039,
  "epssPercentile": 0.33438,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "tor",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "0.4.9.9-1",
      "fix": "DEBIAN-CVE-2026-77639",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-77639",
      "released": "2026-08-21T23:37:15Z"
    },
    {
      "platform": "linux",
      "product": "tor",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "0.4.9.11-0\u002Bdeb13u1",
      "fix": "DEBIAN-CVE-2026-77639",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-77639",
      "released": "2026-08-21T23:37:15Z"
    },
    {
      "platform": "linux",
      "product": "tor",
      "release": "Debian 14",
      "fixedVersion": "0.4.9.9-1",
      "fix": "DEBIAN-CVE-2026-77639",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-77639",
      "released": "2026-08-21T23:37:15Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T19:12:23Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}