CVE-2026-22218Chainlit versions prior to 2.9.4 contain an arbitrary file read vulnerability in the /project/element update flow.
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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.
- CVSS
- 6.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
- Weakness (CWE)
- CWE-22
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Analyzed
- Record last updated
- Jul 14, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
chainlit chainlit chainlit:chainlit | before 2.9.4 | NVD |
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
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.