CVE-2026-91201
DocsGPT through 0.20.0 OAuth Token Disclosure via Wildcard postMessage
- State
- Published
- Severity
- 5.3 Medium
- Published
- Sep 14, 2026
- Updated
- Sep 24, 2026
- Reserved
- Sep 14, 2026
Description
DocsGPT through 0.20.0 posts OAuth connector session tokens to a wildcard target origin in the callback-status endpoint without validating sender origin. Attackers can obtain session tokens and provider account emails by acting as window.opener during OAuth authorization, then use tokens to disconnect victims' cloud storage connectors.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 5.3 Medium | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 5.4 Medium | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:L | VulnCheck |
Weaknesses
- CWE-346 Origin Validation Error
Affected Products
| Product | Versions |
|---|---|
DocsGPTarc53 |
|
References
- GitHub Issue #2766issue-tracking
- https://github.com/arc53/DocsGPTproduct
- https://github.com/arc53/DocsGPT/blob/c36b0af17037449f34449efa97da82becfc9492d/docsgpt/api/connector/routes.py#L515-L527technical-description
- https://github.com/arc53/DocsGPT/blob/c36b0af17037449f34449efa97da82becfc9492d/frontend/src/components/ConnectorAuth.tsx#L57-L80technical-description
- https://github.com/arc53/DocsGPT/blob/c36b0af17037449f34449efa97da82becfc9492d/docsgpt/api/connector/routes.py#L344-L366technical-description
- VulnCheck Advisory: DocsGPT through 0.20.0 OAuth Token Disclosure via Wildcard postMessagethird-party-advisory
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