{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "1.72.0"
              },
              {
                "last_affected": "1.74.4"
              }
            ],
            "source": "AFFECTED_FIELD"
          },
          "events": [
            {
              "introduced": "38ab3dd5b1df946aecf5bd085c671c86f46f68eb"
            },
            {
              "last_affected": "5bc93a2a7ab0ebd0a11352bc4968eabeffb18027"
            }
          ],
          "repo": "https://github.com/rclone/rclone",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-6jcg-q3wp-x2f4"
  ],
  "database_specific": {
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
      "CWE-129"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/79xxx/CVE-2026-79775.json"
  },
  "details": "rclone versions \u003e= v1.72.0 and \u003c= v1.74.4 (fixed in v1.75.0) contain multiple denial-of-service vulnerabilities in the archive backend's SquashFS parser, which relies on the github.com/diskfs/go-diskfs dependency. The parser fails to validate attacker-controlled superblock and metadata values before use. An attacker who can place or modify a SquashFS image in storage exposed through an rclone :archive: remote can craft a malicious image that triggers an integer division-by-zero panic (zero block size), an out-of-bounds slice panic (out-of-range inode metadata offset), or a non-progress CPU loop (truncated metadata stream). Variants 1 and 2 terminate the rclone process and, via 'rclone serve sftp', can crash the entire SFTP server; variant 3 causes sustained CPU consumption. Parsing is lazy, so a victim or remote client must address or descend into the malicious archive object to trigger it.",
  "id": "CVE-2026-79775",
  "modified": "2026-08-31T03:30:19.877475829Z",
  "published": "2026-08-25T15:16:06.427Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/79xxx/CVE-2026-79775.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/rclone/rclone/security/advisories/GHSA-6jcg-q3wp-x2f4"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-79775"
    },
    {
      "type": "ADVISORY",
      "url": "https://www.vulncheck.com/advisories/rclone-archive-backend-squashfs-parser-denial-of-service"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "rclone Archive Backend SquashFS Parser Denial of Service"
}