CVE-2026-101056 Cloudreve before 4.16.1 Authentication Bypass via Cached Context Hint
Attackers can bypass share access controls to generate signed file URLs for deleted or expired shares, allowing unauthorized data access.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-101056?
CVE-2026-101056 is a medium-severity authentication bypass vulnerability in cloudreve, published on 27 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Cloudreve before 4.16.1 fails to revalidate share access when restoring cached navigator state from a context_hint UUID. Attackers who previously had valid share access can replay the cached hint to generate signed file URLs for up to 300 seconds after the share is deleted, expires, or reaches zero remaining downloads.
Weakness: CWE-863
Which versions are affected by CVE-2026-101056?
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-2026-101056?
No fix has been published for CVE-2026-101056 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-101056 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-101056 exists.
Sources
Also known as GHSA-qh53-mf6v-496j, GHSA-vx2m-jpxr-xv7w, GO-2026-6287.