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CVE-2026-91201— DocsGPT through 0.20.0 OAuth Token Disclosure via Wildcard postMessage

Quick assessment

Affected
arc53 DocsGPT
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 DocsGPT 0.20.0 及之前版本中，OAuth 连接器在回调状态（callback-status）端点处将会话令牌发送至通配符目标源，且未验证发送方来源。攻击者可以在 OAuth 授权过程中冒充 window.opener，从而获取会话令牌和提供商账户邮箱地址，并随后利用这些令牌断开受害者的云存储连接器。

CVSS 5.4 · Medium EPSS 0.14% · P4

Affected Version Matrix 1

VendorProduct Version RangeStatus
arc53 DocsGPT ≤ 0.20.0 affected
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I. Basic Information for CVE-2026-91201

Vulnerability Information
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Vulnerability Title
DocsGPT through 0.20.0 OAuth Token Disclosure via Wildcard postMessage
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
源验证错误
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
arc53 DocsGPT 0 ~ 0.20.0 -

II. Public POCs for CVE-2026-91201

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III. Intelligence Information for CVE-2026-91201

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Patches & Fixes for CVE-2026-91201 (3)

Vendor Advisories for CVE-2026-91201 (1)

Proof of Concept for CVE-2026-91201 (1)

Other References for CVE-2026-91201 (1)

IV. Related Vulnerabilities

Same product: DocsGPT
Same vendor: arc53
Same weakness: CWE-346

V. Comments for CVE-2026-91201

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