Authorization Bypass Through User-Controlled Key Affecting chainlit package, versions [1.0.500,]
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published1 Sept 2026
- disclosed31 Aug 2026
- creditGeorge Chen
Introduced: 31 Aug 2026
NewCVE-2026-82290 (opens in a new tab)How to fix?
There is no fixed version for chainlit.
Overview
chainlit is a Build Conversational AI.
Affected versions of this package are vulnerable to Authorization Bypass Through User-Controlled Key in the feedback PUT and DELETE endpoints in backend/chainlit/server.py. An authenticated attacker can modify or delete other users’ feedback by supplying arbitrary feedback identifiers. This corrupts human-rating data used for model evaluation and can undermine the integrity of stored feedback records for anyone relying on Chainlit’s review workflow.