Server-Side Request Forgery Vulnerability in Chainlit by Chainlit
CVE-2026-22219

8.3HIGH

Key Information:

Vendor

Chainlit

Status
Chainlit
Vendor
CVE Published:
19 January 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-22219?

The vulnerability in Chainlit allows an authenticated client to exploit the /project/element update process when utilizing the SQLAlchemy data layer backend. By injecting a user-controlled URL in an Element, an attacker can trigger outbound HTTP GET requests from the Chainlit server. This flaw exposes internal network services or cloud metadata endpoints to potential exploitation, allowing unauthorized access to sensitive information stored on the configured storage provider.

Affected Version(s)

Chainlit 0 < 2.9.4

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-22219 - Proof of Concept

References

https://github.com/Chainlit/chainlit/releases/tag/2.9.4
release-notespatch
https://www.zafran.io/resources/chainleak-critical-ai-fra...
technical-descriptionexploit
https://www.vulncheck.com/advisories/chainlit-sqlalchemy-...
third-party-advisory

CVSS V4

Score:
8.3
Severity:
HIGH
Confidentiality:
High
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Ido Shani and Gal Zaban of Zafran Security
.