rmyndharis OpenWA up to 0.23.4 privileges management

Summaryinfo

A vulnerability, which was classified as critical, has been found in rmyndharis OpenWA up to 0.23.4. The affected element is an unknown function. The manipulation leads to privileges management. This vulnerability is listed as CVE-2026-91161. The attack may be initiated remotely. There is no available exploit. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in rmyndharis OpenWA up to 0.23.4 and classified as critical. This issue affects an unknown functionality. The manipulation with an unknown input leads to a privileges management vulnerability. Using CWE to declare the problem leads to CWE-269. The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

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.

The advisory is shared at github.com. The identification of this vulnerability is CVE-2026-91161 since 09/14/2026. The exploitation is known to be easy. The attack may be initiated remotely. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1068 for this issue.

Upgrading to version 0.23.5 eliminates this vulnerability.

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Productinfo

Vendor

• rmyndharis

Name

• OpenWA

Version

• 0.23.0
• 0.23.1
• 0.23.2
• 0.23.3
• 0.23.4

Website

• Product: https://github.com/rmyndharis/OpenWA/

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