CVE-2026-91201

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.

CVSS v3 5.4 MEDIUM

5.4^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 2.5

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact LOW

Integrity Impact NONE

Availability Impact LOW

Scope UNCHANGED

References

Link	Resource
https://github.com/arc53/DocsGPT
https://github.com/arc53/DocsGPT/blob/c36b0af17037449f34449efa97da82becfc9492d/docsgpt/api/connector/routes.py#L344-L366
https://github.com/arc53/DocsGPT/blob/c36b0af17037449f34449efa97da82becfc9492d/docsgpt/api/connector/routes.py#L515-L527
https://github.com/arc53/DocsGPT/blob/c36b0af17037449f34449efa97da82becfc9492d/frontend/src/components/ConnectorAuth.tsx#L57-L80
https://github.com/arc53/DocsGPT/issues/2766
https://www.vulncheck.com/advisories/docsgpt-through-0.20.0-oauth-token-disclosure-via-wildcard-postmessage

Configurations

No configuration.

History

No history.

Information

Published : 2026-09-14 23:19

Updated : 2026-09-14 23:19

NVD link : CVE-2026-91201

Mitre link : CVE-2026-91201

CVE.ORG link : CVE-2026-91201

JSON object : View

Products Affected

No product.

CWE

CWE-346

Origin Validation Error

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