CVE-2026-22218

Name: CVE-2026-22218
Creator: NVD / NIST
Published: 2026-01-20T00:15:48.91+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.1/10EPSS 8.84%

Last modified Jun 17, 2026

CVE-2026-22218 is a high-severity vulnerability rated 7.1/10 on the CVSS scale. 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. EPSS estimates a 8.84% chance of exploitation in the next 30 days.

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

Metrics

CVSS 3.1

6.5/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

CVSS 4.0

7.1/10

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

EPSS Probability

8.84%

94.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-22

Affected Software

Vendor	Product	Versions
Chainlit	Chainlit	< 2.9.4

References

https://github.com/Chainlit/chainlit/releases/tag/2.9.4Product, Release Notes
https://www.vulncheck.com/advisories/chainlit-arbitrary-file-read-via-project-elementThird Party Advisory
https://www.zafran.io/resources/chainleak-critical-ai-framework-vulnerabilities-expose-data-enable-cloud-takeoverExploit, Mitigation, Third Party Advisory

Timeline

Published: Jan 20, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-22218?

How severe is CVE-2026-22218?

CVE-2026-22218 has a CVSS score of 7.1/10 (HIGH severity). The EPSS model estimates a 8.84% probability of exploitation in the next 30 days.

How do I fix CVE-2026-22218?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-22218?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST