CVE-2026-73059 stoatchat before 0.15.0 Permission Bypass via message_fetch
Attackers with ViewChannel access can bypass history restrictions to read individual messages by ID in stoatchat.
- 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-2026-73059?
CVE-2026-73059 is a high-severity missing authorization vulnerability in stoatchat, published on 16 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
stoatchat before 0.15.0 contains a permission bypass vulnerability in the message_fetch route that checks only ViewChannel permission instead of requiring ReadMessageHistory. Attackers with ViewChannel access but ReadMessageHistory denied can retrieve individual message content by ID, bypassing the intended history restriction enforced by bulk read routes.
Weakness: CWE-863
Which versions are affected by CVE-2026-73059?
How do I fix CVE-2026-73059?
No fix has been published for CVE-2026-73059 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-2026-73059 being exploited?
There is no known exploitation of CVE-2026-73059 in the wild and no public exploit code.
Sources
Also known as GHSA-8qcg-fhr3-3rx9, GHSA-8qp4-h9xf-2vqr.