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CVE-2026-91161— OpenWA: VIEWER API keys can read WhatsApp group invite codes

Quick assessment

Affected
rmyndharis OpenWA
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.

OpenWA 是一款免费、开源、自托管的 WhatsApp API 网关。在 0.23.5 版本之前，GET /api/sessions/{sessionId}/groups/{groupId}/invite-code 端点以及 GroupGetInviteCode MCP 工具未要求 OPERATOR 角色权限，导致仅具备 VIEWER 角色且限定于特定会话的访问密钥也能获取活跃群组的邀请码。 由于 WhatsApp 的邀请码具备可转移的会话持有者能力，外部账号可在无需 OpenWA 凭证的情况下加入由该会话管理

CVSS 6.4 · Medium EPSS 0.18% · P7

Possible ATT&CK Techniques 1 AI

T1136 · Create Account

Affected Version Matrix 1

VendorProduct Version RangeStatus
rmyndharis OpenWA < 0.23.5 affected
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I. Basic Information for CVE-2026-91161

Vulnerability Information
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Vulnerability Title
OpenWA: VIEWER API keys can read WhatsApp group invite codes
Source: CVE Program / CVE List V5
Vulnerability Description
OpenWA is a free, open source, self-hosted WhatsApp API gateway. Prior to 0.23.5, the GET /api/sessions/{sessionId}/groups/{groupId}/invite-code endpoint and the GroupGetInviteCode MCP tool have no OPERATOR role requirement, allowing a valid VIEWER key scoped to a session to retrieve an active group invite code. The invite code is a transferable WhatsApp bearer capability, so an external account can join a group administered by the session without an OpenWA credential, gain read and post access to the group, and retain membership after the VIEWER key is revoked. Affected deployments are those that issue VIEWER keys to parties who should not be able to add accounts to administered groups; OPERATOR and ADMIN access is intended. This issue is fixed in version 0.23.5.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制不正确
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
rmyndharis OpenWA < 0.23.5 -

II. Public POCs for CVE-2026-91161

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III. Intelligence Information for CVE-2026-91161

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Patches & Fixes for CVE-2026-91161 (3)

Vendor Advisories for CVE-2026-91161 (1)

Other References for CVE-2026-91161 (1)

IV. Related Vulnerabilities

Same product: OpenWA
Same vendor: rmyndharis
Same weakness: CWE-863

V. Comments for CVE-2026-91161

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