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TI-2026-17828 Aliases CVE-2026-22218GHSA-gm79-2pvc-wc75

Chainlit < 2.9.4 Arbitrary File Read via /project/element

Priority MEDIUM 64CWE-22Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Information disclosure
Confidentiality · integrity · availability
High · None · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-22 and the CVSS impact.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.09724 95th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA and NVD
Fix Fixed Chainlit (Chainlit): 2.9.4

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
ChainlitChainlitbefore 2.9.42.9.4Patch availableCNA
  • Chainlit VendorChainlit Affected before 2.9.4 Fixed in 2.9.4 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:chainlit:chainlit:*:*:*:*:*:*:*:*before 2.9.4VulnerableChainlit
  • cpe:2.3:a:chainlit:chainlit:*:*:*:*:*:*:*:* Versions before 2.9.4 Vulnerable ·Chainlit

Remediation

  • Fix · CNA Chainlit (Chainlit) Fixed in 2.9.4

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    Chainlit 2.9.4

    2 records Highest priority Priority MEDIUM 2 MEDIUM

    Other records, highest priority first

    • TI-2026-17829 Chainlit < 2.9.4 SQLAlchemy Data Layer SSRF via /project/elementPriority MEDIUM 50
    Show all 2 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-22218
  2. 2026-10-03 Alias added: GHSA-gm79-2pvc-wc75

References

Exploit 1

Patch 1

  • TI-2026-17829 Chainlit < 2.9.4 SQLAlchemy Data Layer SSRF via /project/element CVSS 4.0HIGH 8.3

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences