CVE-2026-74869 stoatchat before 0.15.0 Missing Authorization via Subscribe
Authenticated attackers can enumerate members and monitor profile updates of private servers without membership by exploiting missing authorization in the Subscribe handler.
- 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-2026-74869?
CVE-2026-74869 is a high-severity missing authorization vulnerability in stoatchat, published on 17 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 missing authorization vulnerability in the Subscribe message handler that allows authenticated attackers to enumerate members and monitor profile updates of private servers without membership. Attackers can subscribe to any server's member-update topic by sending a Subscribe message with an arbitrary server ID, receiving live UserUpdate events including display names, avatars, and status changes for members they should not have access to.
Weakness: CWE-862
Which versions are affected by CVE-2026-74869?
How do I fix CVE-2026-74869?
No fix has been published for CVE-2026-74869 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-2026-74869 being exploited?
There is no known exploitation of CVE-2026-74869 in the wild and no public exploit code.
Sources
Also known as GHSA-5cwg-5wjq-gqw2, GHSA-jj3j-9qr7-jgfc.