Medium severity · published Aug 25, 2026
CVE-2026-79779
rclone before v1.75.0 WebDAV Credential Exposure via HTTPS-to-HTTP Redirect
5.3
CVSS
0.1%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack vector
Adjacent
Complexity
High
Privileges
None
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.1% · higher than 1% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
RC
rclone · rclone
before 1.75.0 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-79779
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-79779
github.com
https://github.com/rclone/rclone/security/advisories/GHSA-h4mf-4v27-hggj
www.vulncheck.com
https://www.vulncheck.com/advisories/rclone-before-webdav-credential-exposure-via-https-to-http-redirect
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