CVE-2026-109568 Shaark 1.2.13 through 1.2.44 Missing Authorization via API Update and Delete Routes
Authenticated users can modify or delete other users' content in Shaark due to missing ownership checks in API routes.
- 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-2026-109568?
CVE-2026-109568 is a high-severity missing authorization vulnerability in MarceauKa Shaark, published on 12 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Shaark 1.2.13 through 1.2.44 contains a missing authorization vulnerability in the Link, Story, Chest and Album API controllers that skips ownership checks. Authenticated non-admin users can send PUT or DELETE requests to /api/{link,story,chest,album}/{id} with numeric IDs to overwrite or delete other users' content, including private items.
Weakness: CWE-639
Which versions are affected by CVE-2026-109568?
How do I fix CVE-2026-109568?
No fix has been published for CVE-2026-109568 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-2026-109568 being exploited?
There is no known exploitation of CVE-2026-109568 in the wild and no public exploit code.
Sources
Also known as GHSA-33mg-5c73-726g.