CVE-2026-22218

Description

Chainlit versions prior to 2.9.4 contain an arbitrary file read vulnerability in the /project/element update flow. An authenticated client can send a custom Element with a user-controlled path value, causing the server to copy the referenced file into the attacker’s session. The resulting element identifier (chainlitKey) can then be used to retrieve the file contents via /project/file/, allowing disclosure of any file readable by the Chainlit service.

Affected Platforms

Weakness Type

CWE-22

References

• https://github.com/Chainlit/chainlit/releases/tag/2.9.4
• https://www.vulncheck.com/advisories/chainlit-arbitrary-file-read-via-project-el…
• https://www.zafran.io/resources/chainleak-critical-ai-framework-vulnerabilities-…