{"id":"CVE-2026-79775","aliases":["BIT-rclone-2026-79775","DEBIAN-CVE-2026-79775","EUVD-2026-65533","GHSA-6jcg-q3wp-x2f4","GHSA-hqq5-m7fp-mqc3","UBUNTU-CVE-2026-79775"],"status":"published","title":"rclone Archive Backend SquashFS Parser Denial of Service","description":"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.","severity":{"version":"4.0","score":7.1,"vector":"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","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00371,"percentile":0.31287,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-129"],"published":"2026-08-25T15:16:06Z","modified":"2026-10-28T02:30:33Z","fixes":[{"ecosystem":"Bitnami","package":"rclone","fixed_in":["1.75.0"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Bitnami","package":"rclone","ranges":[{"type":"SEMVER","events":[{"introduced":"1.72.0"},{"fixed":"1.75.0"}]}]},{"source":"osv","ecosystem":"Debian:12","package":"rclone","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.60.1+dfsg-2","1.60.1+dfsg-3","1.60.1+dfsg-4","1.65.0+dfsg-1","1.65.0+dfsg-2","1.69.3+dfsg-1","1.69.3+dfsg-2","1.69.3+dfsg-3"]},{"source":"osv","ecosystem":"Debian:13","package":"rclone","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.60.1+dfsg-4","1.65.0+dfsg-1","1.65.0+dfsg-2","1.69.3+dfsg-1","1.69.3+dfsg-2","1.69.3+dfsg-3"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"rclone","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.36-3","1.36-3ubuntu0.1","1.36-3ubuntu0.2"]},{"source":"osv","ecosystem":"Ubuntu:Pro:20.04:LTS","package":"rclone","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.47.0+ex1-6","1.47.0+ex1-7","1.49.5-2","1.49.5-3","1.50.2-2","1.50.2-2ubuntu0.1","1.50.2-2ubuntu0.2","1.50.2-2ubuntu0.2+esm1"]},{"source":"osv","ecosystem":"Ubuntu:Pro:22.04:LTS","package":"rclone","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.53.3-1","1.53.3-2","1.53.3-4","1.53.3-4ubuntu1","1.53.3-4ubuntu1.22.04.1","1.53.3-4ubuntu1.22.04.2","1.53.3-4ubuntu1.22.04.3","1.53.3-4ubuntu1.22.04.3+esm1","1.53.3-4ubuntu1.22.04.4","1.53.3-4ubuntu1.22.04.4+esm1","1.53.3-4ubuntu1.22.04.5","1.53.3-4ubuntu1.22.04.5+esm1"]},{"source":"osv","ecosystem":"Ubuntu:Pro:24.04:LTS","package":"rclone","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.60.1+dfsg-2build1","1.60.1+dfsg-3","1.60.1+dfsg-3ubuntu0.24.04.1","1.60.1+dfsg-3ubuntu0.24.04.2","1.60.1+dfsg-3ubuntu0.24.04.3","1.60.1+dfsg-3ubuntu0.24.04.4","1.60.1+dfsg-3ubuntu0.24.04.4+esm1","1.60.1+dfsg-3ubuntu0.24.04.5","1.60.1+dfsg-3ubuntu0.24.04.5+esm1","1.60.1+dfsg-3ubuntu0.24.04.6","1.60.1+dfsg-3ubuntu0.24.04.6+esm1"]},{"source":"osv","ecosystem":"Ubuntu:26.10","package":"rclone","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.60.1+dfsg-4ubuntu3","1.69.3+dfsg-3","1.69.3+dfsg-3ubuntu1"]},{"source":"osv","ecosystem":"Ubuntu:Pro:26.04:LTS","package":"rclone","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.60.1+dfsg-4ubuntu2","1.60.1+dfsg-4ubuntu3","1.60.1+dfsg-4ubuntu3.1","1.60.1+dfsg-4ubuntu3.1+esm1","1.60.1+dfsg-4ubuntu3.2","1.60.1+dfsg-4ubuntu3.2+esm1"]}],"products":[{"vendor":"rclone","product":"rclone"}],"references":[{"url":"https://github.com/rclone/rclone/security/advisories/GHSA-6jcg-q3wp-x2f4","tags":["vendor-advisory","exploit","web","advisory","report"]},{"url":"https://www.vulncheck.com/advisories/rclone-archive-backend-squashfs-parser-denial-of-service","tags":["third-party-advisory","web","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-79775","tags":["web","advisory"]},{"url":"https://github.com/advisories/GHSA-hqq5-m7fp-mqc3"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/79xxx/CVE-2026-79775.json","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-79775","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-79775","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-79775","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2026-79775","title":"rclone Archive Backend SquashFS Parser Denial of Service","description":"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.","status":"published","published":"2026-08-25T15:16:06.427Z","modified":"2026-08-29T11:48:01.347Z","cvss":[{"version":"4.0","score":7.1,"vector":"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","level":"high","assessor":"cna"},{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"cna"}],"cwes":["CWE-129"],"updated_at":"2026-11-02T13:50:38.739766Z"}],"euvd":[{"id":"EUVD-2026-65533","description":"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.","status":"published","published":"2026-08-25T15:16:06Z","modified":"2026-08-29T11:48:01Z","cvss":[{"version":"4.0","score":7.1,"vector":"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","level":"high"}],"updated_at":"2026-11-02T18:01:21.947009Z"}],"ghsa":[{"id":"GHSA-hqq5-m7fp-mqc3","title":"rclone versions \u003e= v1.72.0 and \u003c= v1.74.4 (fixed in v1.75.0) contain multiple denial-of-service...","description":"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.","status":"published","published":"2026-08-25T18:31:54Z","modified":"2026-08-25T18:32:01Z","cvss":[{"version":"4.0","score":7.1,"vector":"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"high"},{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"cwes":["CWE-129"],"updated_at":"2026-11-02T15:10:57.962573Z"}],"nvd":[{"id":"CVE-2026-79775","description":"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.","status":"published","published":"2026-08-25T16:17:29.233Z","modified":"2026-09-10T20:46:19.78Z","cvss":[{"version":"4.0","score":7.1,"vector":"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"high","assessor":"secondary"},{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"secondary"}],"cwes":["CWE-129"],"updated_at":"2026-11-02T14:12:41.347728Z"}],"osv":[{"id":"CVE-2026-79775","title":"rclone Archive Backend SquashFS Parser Denial of Service","description":"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.","status":"published","published":"2026-08-25T15:16:06.427Z","modified":"2026-10-28T02:30:33.404727667Z","cvss":[{"version":"4.0","score":7.1,"vector":"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","level":"high"}],"cwes":["CWE-129"],"updated_at":"2026-11-02T15:45:17.44708Z"},{"id":"DEBIAN-CVE-2026-79775","description":"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.","status":"published","published":"2026-08-25T16:17:29.233Z","modified":"2026-10-01T03:03:35.123306421Z","cvss":[{"version":"4.0","score":7.1,"vector":"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"high"}],"updated_at":"2026-11-02T15:46:04.001673Z"},{"id":"UBUNTU-CVE-2026-79775","description":"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.","status":"published","published":"2026-08-25T16:17:00Z","modified":"2026-10-17T13:01:10.142348705Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"},{"version":"4.0","score":7.1,"vector":"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","level":"high"}],"updated_at":"2026-11-02T16:57:18.015985Z"},{"id":"BIT-rclone-2026-79775","title":"rclone Archive Backend SquashFS Parser Denial of Service","description":"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.","status":"published","published":"2026-09-25T12:30:06.94Z","modified":"2026-09-25T14:25:38.835174162Z","updated_at":"2026-11-02T15:28:35.111822Z"}]}}