MEDIUM4.2

PYSEC-2026-1238

Chainlit contains an authorization bypass vulnerability

Quick fix

PYSEC-2026-1238 — chainlit: upgrade to the fixed version with the command below.

pip install --upgrade 'chainlit>=2.8.5'

Details

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.

Are you affected?

Enter the version of the package you're using.

Affected packages

PyPI/chainlit

Introduced in: 0Fixed in: 2.8.5

Fixpip install --upgrade 'chainlit>=2.8.5'

References

https://nvd.nist.gov/vuln/detail/CVE-2025-68492[ADVISORY]
https://github.com/Chainlit/chainlit/pull/2637[WEB]
https://github.com/Chainlit/chainlit/commit/8f1153db439eca58ae5c50c8276ba6fdd311448e[WEB]
https://github.com/Chainlit/chainlit[PACKAGE]
https://github.com/Chainlit/chainlit/releases[WEB]
https://github.com/Chainlit/chainlit/releases/tag/2.8.5[WEB]
https://jvn.jp/en/jp/JVN34964581[WEB]
https://pypi.org/project/chainlit[PACKAGE]
https://github.com/advisories/GHSA-v492-6xx2-p57g[ADVISORY]