CVE-2026-91201

DocsGPT through 0.20.0 OAuth Token Disclosure via Wildcard postMessage

Published Sep 14, 2026 CVSS 4.0 · 5.3 Medium EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
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.
Title DocsGPT through 0.20.0 OAuth Token Disclosure via Wildcard postMessage
First Time appeared Arc53
Arc53 docsgpt
Weaknesses CWE-346
CPEs cpe:2.3:a:arc53:docsgpt:*:*:*:*:*:*:*:*
Vendors & Products Arc53
Arc53 docsgpt
References
Metrics cvssV3_1

{'score': 5.4, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:L'}

cvssV4_0

{'score': 5.3, 'vector': '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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
VulnCheck
Published
Updated
Sep 24, 2026, 2:22 PM
Reserved
Sep 14, 2026, 9:55 PM
Status
Deferred
Published
Sep 14, 2026, 11:19 PM
Modified
Sep 23, 2026, 5:17 PM