CVE-2026-82290 Chainlit Feedback Endpoints Missing Ownership Validation
Authenticated attackers can modify or delete other users' feedback records due to missing ownership validation in Chainlit endpoints.
- 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-2026-82290?
CVE-2026-82290 is a medium-severity missing authorization vulnerability in chainlit, published on 28 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Chainlit through 2.12.0 fails to validate ownership of feedback records in PUT and DELETE endpoints. Authenticated attackers can delete or modify other users' feedback by supplying arbitrary feedback identifiers, corrupting human-rating data used for model evaluation.
Weakness: CWE-639
Which versions are affected by CVE-2026-82290?
How do I fix CVE-2026-82290?
No fix has been published for CVE-2026-82290 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-2026-82290 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-82290 exists.
Sources
Also known as GHSA-4hhp-mjp7-37r2.