Is CVE-2026-79779 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-79779 being exploited in the wild.

How severe is CVE-2026-79779?

Medium severity, with a CVSS score of 5.3, published 25 August 2026.

Which products and versions are affected?

github.com/rclone/rclone (Go) SEMVER:introduced=0,fixed=1.75.0; Rclone < v1.75.0.

Is there a fix for CVE-2026-79779?

Yes. github.com/rclone/rclone (Go): upgrade to 1.75.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-79779 attacked?

It is attacked from the adjacent network.

Am I affected by CVE-2026-79779?

Check whether you run github.com/rclone/rclone (Go) or Rclone at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-79779: rclone WebDAV credential exposure via HTTPS-to-HTTP redirect

Q: Is there a fix for CVE-2026-79779?

Yes. github.com/rclone/rclone (Go): upgrade to 1.75.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

Q: How is CVE-2026-79779 attacked?

It is attacked from the adjacent network.

Q: Am I affected by CVE-2026-79779?

Check whether you run github.com/rclone/rclone (Go) or Rclone at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-79779 · Severity: medium · CVSS 5.3 · Published 2026-08-25

rclone is a command-line utility for syncing files to cloud storage and WebDAV servers. Versions before v1.75.0 fail to reject downgrades from HTTPS to plaintext HTTP when a server redirects traffic, allowing attackers positioned on the network path to intercept and replay authentication credentials (passwords and session cookies) to access the compromised account's WebDAV files.

Technologies: github.com/rclone/rclone (Go), Rclone. Vendors: Go, Rclone.

Quick answers

Is CVE-2026-79779 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-79779 being exploited in the wild.
How severe is CVE-2026-79779?: Medium severity, with a CVSS score of 5.3, published 25 August 2026.
Which products and versions are affected?: github.com/rclone/rclone (Go) SEMVER:introduced=0,fixed=1.75.0; Rclone < v1.75.0.
Is there a fix for CVE-2026-79779?: Yes. github.com/rclone/rclone (Go): upgrade to 1.75.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-79779 attacked?: It is attacked from the adjacent network.
Am I affected by CVE-2026-79779?: Check whether you run github.com/rclone/rclone (Go) or Rclone at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

github.com/rclone/rclone (Go): upgrade to 1.75.0 or later
```
go get github.com/rclone/rclone@v1.75.0
```

Technical details

The vulnerability is a cleartext transmission issue (CWE-319) in rclone's redirect handling for WebDAV backends. The PreserveMethodRedirectFn function in lib/rest/rest.go restores the HTTP method on redirects but fails to reject same-host HTTPS-to-HTTP downgrades or compare the full origin tuple (scheme, hostname, port). As a result, Go's built-in credential-forwarding rules preserve Basic authentication headers and Cookie values even when the new endpoint uses plaintext HTTP. An adjacent or on-path attacker observing the plaintext hop can capture and replay these credentials for WebDAV operations without requiring authentication. The vulnerability requires a legitimate WebDAV endpoint to emit a 307/308 redirect to HTTP on the same hostname and an adjacent network position to intercept traffic. Patches are available in v1.75.0 and later.

Affected products

rclone rclone < v1.75.0

Identifiers

CVE-2026-79779
GHSA-h4mf-4v27-hggj
GO-2026-6197

Timeline

2026-07-31: disclosed
2026-08-25: patched: v1.75.0 released

References

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