# CVE-2026-79775

## Summary

- **CVE ID:** CVE-2026-79775
- **Severity:** HIGH
- **CVSS Score:** 7.1 (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)
- **CWE:** CWE-129
- **Published:** Aug 25, 2026
- **Last Modified:** Aug 29, 2026

## Description

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 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.

## Affected Products

- rclone — rclone (0)
- rclone — rclone (1.72.0)

## References

- [CNA](https://github.com/rclone/rclone/security/advisories/GHSA-6jcg-q3wp-x2f4)
- [CNA](https://www.vulncheck.com/advisories/rclone-archive-backend-squashfs-parser-denial-of-service)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.31%
- **EPSS Percentile:** 23.1

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._