CVE-2026-79779

6.0 MEDIUM 0.1% exploit odds Fix listed Other

What it is

rclone versions before v1.75.0 fail to reject transport downgrades in redirect handling, allowing Basic authorization and Cookie headers to be replayed over plaintext HTTP after same-host HTTPS-to-HTTP redirects. An on-path attacker observing the plaintext hop can capture and reuse credentials to perform WebDAV operations with the compromised account's permissions.

At a glance

Exploitability: Can be exploited from the same network segment without logging in. High risk of data exposure.
Exploit odds: 0.1% chance of exploitation in the next 30 days (EPSS).
Fix: A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

2026-08-25 16:17 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-09-10 20:46 UTC Last updatedMost recent change to the record

Details

Published: 2026-08-25 16:17 UTC
Last modified: 2026-09-10 20:46 UTC
Exploit probability: 0.1% · EPSS, next 30 days
Weakness: CWE-319 · Cleartext transmission
Record status: Awaiting Analysis

Attack profile CVSS 4.0 · 6.0

Attack vector: Adjacent network
Complexity: High
Attack requirements: Present
Privileges needed: None
User interaction: None
Confidentiality: High
Integrity: None
Availability: None

Raw vector

CVSS:4.0/AV:A/AC:H/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/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

Download Square Reddit

Fix and advisories

https://github.com/rclone/rclone/security/advisories/GHSA-h4mf-4v27-hggj

References

NVD record · CVE.org record