CVE-2026-66751 Let's Chat 0.3.0 - 0.4.8 Improper Authorization via DELETE /rooms/:room
Authenticated users can archive any room, including private ones, due to missing ownership checks in the delete 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-2026-66751?
CVE-2026-66751 is a medium-severity missing authorization vulnerability in sdelements lets-chat, published on 28 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Let's Chat 0.3.0 through 0.4.8 contains an improper authorization vulnerability that allows any authenticated user to archive any room on the server by sending a DELETE request to the rooms handler without ownership verification. Attackers can enumerate room IDs via the rooms listing endpoint and permanently archive private or password-protected rooms they cannot access, with no application-level recovery path requiring direct database intervention to restore.
Weakness: CWE-862
Which versions are affected by CVE-2026-66751?
How do I fix CVE-2026-66751?
No fix has been published for CVE-2026-66751 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-2026-66751 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-66751 exists.
Public exploit code: 1 proofs of concept on GitHub.
Sources
Also known as GHSA-r5q3-g4qh-p8mp.