Description
Chainlit versions prior to 2.8.5 contain an authorization bypass through user-controlled key vulnerability. If this vulnerability is exploited, threads may be viewed or thread ownership may be obtained by an attacker who can log in to the product.
References (2)
Core 2
Core References
Various Sources
https://github.com/Chainlit/chainlit/releases
Third Party Advisory
https://jvn.jp/en/jp/JVN34964581/
Scores
CVSS v3
4.2
EPSS
0.0001
EPSS Percentile
2.5%
Attack Vector
NETWORK
CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-639
Status
published
Products (2)
Chainlit/Chainlit
prior to 2.8.5
pypi/chainlit
0 - 2.8.5PyPI
Published
Jan 14, 2026
Tracked Since
Feb 18, 2026