CVE-2026-101051 Cloudreve before 4.16.1 Path Traversal via Remote Download
Authenticated attackers can exploit path traversal in remote downloaders to write files outside the intended directory in Cloudreve.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-101051?
CVE-2026-101051 is a low-severity path traversal vulnerability in cloudreve, published on 27 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Cloudreve before 4.16.1 fails to properly sanitize file paths returned by remote downloaders, allowing authenticated users to create files outside the selected destination directory. Attackers can exploit path traversal sequences in downloader metadata to write files to unexpected locations within accessible namespaces.
Weakness: CWE-22
Which versions are affected by CVE-2026-101051?
5 open source packages ship an affected version, including github.com/cloudreve/Cloudreve/v4, github.com/cloudreve/Cloudreve and github.com/cloudreve/Cloudreve/v3.
| Package | Affected | Fixed in |
|---|---|---|
github.com/cloudreve/Cloudreve/v4 Go | All versions | None |
github.com/cloudreve/Cloudreve/v4 Go | All versions to 4.0.0-20260606032813-26b6b1044b02 | None |
github.com/cloudreve/Cloudreve/v4 Go | All versions to 4.0.0-20260606032813-26b6b1044b02 | None |
github.com/cloudreve/Cloudreve Go | All versions | None |
github.com/cloudreve/Cloudreve/v3 Go | All versions | None |
How do I fix CVE-2026-101051?
No fix has been published for CVE-2026-101051 yet. Limit exposure of the affected software until one is available.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2026-101051 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-101051 exists.
Sources
Also known as GHSA-w8j7-39hp-8x59, GHSA-wv98-qffc-cvmj, GO-2026-6289.