CVE-2026-56768 Seahub < 13.0.23 - Authentication Bypass in ShareLinkZipTaskView GET Method
Unauthenticated attackers with a share-link token can bypass authentication to download entire shared directory trees via the share-link-zip-task endpoint.
- 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-2026-56768?
CVE-2026-56768 is a high-severity missing authorization vulnerability in haiwen seahub, published on 25 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Seahub before 13.0.23 does not enforce SHARE_LINK_LOGIN_REQUIRED on GET /api/v2.1/share-link-zip-task/, allowing unauthenticated users to bypass authentication. Attackers with a folder share-link token can call the GET endpoint to obtain a fileserver zip token and download entire shared directory trees.
Weakness: CWE-862
Which versions are affected by CVE-2026-56768?
How do I fix CVE-2026-56768?
No fix has been published for CVE-2026-56768 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-56768 being exploited?
There is no known exploitation of CVE-2026-56768 in the wild and no public exploit code.
Sources
Also known as GHSA-w52g-25r7-3c46.