{"id":"CVE-2026-79775","title":"rclone versions >= v1.72.0 and <= 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","summary":"rclone versions >= v1.72.0 and <= 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 val…","severity":"medium","cvss":6.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-129"],"published":"2026-08-25","updated":"2026-09-10","sourceUpdated":"2026-09-10T20:46:19.780","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-79775","references":[{"url":"https://github.com/rclone/rclone/security/advisories/GHSA-6jcg-q3wp-x2f4","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/rclone-archive-backend-squashfs-parser-denial-of-service","label":"disclosure@vulncheck.com"},{"url":"https://github.com/rclone/rclone/security/advisories/GHSA-6jcg-q3wp-x2f4","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"tags":["nvd"],"epss":0.00307,"epssPercentile":0.23645,"ingestedAt":"2026-08-29T21:42:33.610Z","slug":"CVE-2026-79775","body":"## Overview\n\nrclone versions >= v1.72.0 and <= 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":36,"depthScoreParts":{"impact":35.8,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}