99AI through 4.3.0 IDOR via /api/chatLog/querySingleChat Chat Message Disclosure
Published Oct 16, 2026 · Updated Nov 3, 2026
Original summary
Normalized public record · Updated Nov 3, 2026
99AI through 4.3.0 IDOR via /api/chatLog/querySingleChat Chat Message Disclosure
Publisher and source text is retained separately from QFinch interpretation.
QFinch assessment
99AI through 4.3.0 contains an insecure direct object reference vulnerability that allows unauthenticated attackers to read other users' chat messages because querySingleChat lacks an owner check. Attackers can send a fingerprint header to obtain a visitor JWT and iterate sequential chatId values to retrieve other users' message content and task data.
Evidence: public source recordsAffected products
| Affected package, product or range | Fix status |
|---|---|
| Consult the referenced vendor advisory for affected versions. | Consult source advisory |
Matching a version is only one part of assessing exposure. QFinch has not assessed your environment on this public page.
Remediation
Apply the vendor-supported fixed release or mitigation, then verify the affected component is no longer reachable.
- Confirm the affected product and reachable code path exist in your environment.
- Apply the vendor-supported patch or mitigation from the primary advisory.
- Rescan the exact deployed revision and retain verification evidence.
Evidence coverage
- SSVC priority
- LOW
- Confidence
- Not available
- Aliases
- None reported
Scores appear only when corresponding evidence exists. Missing data is never interpreted as zero risk.
Sources and record history
- hackmd.io ↗
- Source repository ↗
- Source repository ↗
- Source repository ↗
- VulnCheck Advisory: 99AI through 4.3.0 IDOR via /api/chatLog/querySingleChat Chat Message Disclosure ↗
Record history
Published Oct 16, 2026 · Last refreshed Nov 3, 2026