Auth bypass in Rmyndharis Openwa
CVE-2026-91160
OpenWA is a free, open source, self-hosted WhatsApp API gateway. Prior to 0.23.5, the /events WebSocket gateway delivers the session.qr event to a VIEWER API key that subscribes by event name or through either wildcard subscription form, even though GET /api/sessions/{sessionId}/qr requires the OPERATOR role. When an allowed session is waiting to be paired, the exposed QR lets the key holder link an external device to the WhatsApp account and then read and send messages outside OpenWA and its audit trail. Keys restricted through allowedSessions remain limited to those sessions, and deployments that issue only OPERATOR or ADMIN keys are not affected. This issue is fixed in version 0.23.5.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.2 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.003 (16.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 16th percentile — 16.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000
Affected products
- Rmyndharis Openwa — versions < 0.23.5
Weakness classification (CWE)
References
- https://github.com/rmyndharis/OpenWA/security/advisories/GHSA-m427-j4h4-9qwj
- https://github.com/rmyndharis/OpenWA/pull/1602
- https://github.com/rmyndharis/OpenWA/commit/acc23c3803c07f43791a92e8e48456572fd69bdc
- https://github.com/rmyndharis/OpenWA/commit/b9d9ea1c57bde98b7833a5d6e482998703667ef0
- https://github.com/rmyndharis/OpenWA/releases/tag/v0.23.5
Frequently asked questions
- What is CVE-2026-91160?
- CVE-2026-91160 is a high-severity vulnerability in Rmyndharis Openwa, classified under Missing Authorization. CVSS score: 8.2/10. Published 2026-09-24.
- How severe is CVE-2026-91160?
- High severity. CVSS v3 base score is 8.2 out of 10.