# CVE-2026-79779: rclone before v1.75.0 WebDAV Credential Exposure via HTTPS-to-HTTP Redirect

> An on-path attacker can capture credentials via HTTPS-to-HTTP redirects in rclone, enabling unauthorized WebDAV access and data theft.

- **Severity:** Medium 6.0 (`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`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 25 Aug 2026
- **Updated:** 27 Aug 2026
- **Also known as:** BIT-rclone-2026-79779, DEBIAN-CVE-2026-79779, GHSA-9mph-vxjp-r3rx, GHSA-h4mf-4v27-hggj, GO-2026-6197, MINI-33wg-rg8j-jc2g, MINI-497w-rpcc-vpvh, MINI-5fx4-pg4r-qvgw, MINI-67vg-59gc-4p2r, MINI-7h35-gj84-5wpw, MINI-cw3r-6c77-wg86, MINI-j592-mcwx-mw7r, MINI-x6w4-52gc-7mf8, UBUNTU-CVE-2026-79779

## What is CVE-2026-79779?

CVE-2026-79779 is a medium-severity vulnerability in rclone, published on 25 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim.

### Official 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.

Weakness: CWE-319 (Cleartext Transmission of Sensitive Information)

## Which versions are affected by CVE-2026-79779?

4 open source packages ship an affected version, including github.com/rclone/rclone and rclone.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `github.com/rclone/rclone` | Go | All versions | 1.75.0 |
| `github.com/rclone/rclone` | Go | All versions | 1.75.0 |
| `github.com/rclone/rclone` | Go | All versions | 1.75.0 |
| `rclone` | Bitnami | All versions | 1.75.0 |

## How do I fix CVE-2026-79779?

Upgrade github.com/rclone/rclone to 1.75.0 or later.

## Is CVE-2026-79779 being exploited?

There is no known exploitation of CVE-2026-79779 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-79779 and fix it if it is affected.

What it is: CVE-2026-79779 is a medium-severity vulnerability in rclone, published on 25 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-79779 in the wild and no public exploit code.

Affected packages and fixed versions:
- github.com/rclone/rclone (Go): affected all versions; fixed in 1.75.0
- github.com/rclone/rclone (Go): affected all versions; fixed in 1.75.0
- github.com/rclone/rclone (Go): affected all versions; fixed in 1.75.0
- rclone (Bitnami): affected all versions; fixed in 1.75.0

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-79779/ (Markdown: https://insights.sbomify.com/CVE-2026-79779/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-79779
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-79779
- OSV: https://osv.dev/vulnerability/CVE-2026-79779

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-79779/
Summaries are generated and may contain mistakes; the official description above is the record.