CVE-2026-91201
DocsGPT through 0.20.0 OAuth Token Disclosure via Wildcard postMessage
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.
INFO
Published Date :
Sept. 14, 2026, 10:10 p.m.
Last Modified :
Sept. 14, 2026, 10:10 p.m.
Remotely Exploit :
Yes !
Source :
VulnCheck
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | 83251b91-4cc7-4094-a5c7-464a1b83ea10 | ||||
| CVSS 4.0 | MEDIUM | 83251b91-4cc7-4094-a5c7-464a1b83ea10 |
Solution
- Validate the origin of the sender in the callback-status endpoint.
- Ensure the OAuth connector properly validates the origin.
- Apply updates to the DocsGPT OAuth connector if available.
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CVE-2026-91201 vulnerability anywhere in the article.