CVE-2026-22218

high · 7.1

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/<chainlitKey>, allowing disclosure of any file readable by the Chainlit service.

7.1

CVSS

10.3%

EPSS (exploit prob.)

95th

EPSS percentile

2026-01-20

Published

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Weaknesses

CWE-22

Affected products

Vendor	Product	Affected versions
chainlit	chainlit	< 2.9.4

Check a specific version with /api/v1/cve/match.

References

https://github.com/Chainlit/chainlit/releases/tag/2.9.4
https://www.vulncheck.com/advisories/chainlit-arbitrary-file-read-via-project-element
https://www.zafran.io/resources/chainleak-critical-ai-framework-vulnerabilities-expose-data-enable-cloud-takeover

Query this programmatically:

curl https://evil-db.io/api/v1/cve/CVE-2026-22218