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Vulnerability record · CVE-2026-2577 · published 16 February 2026

CVE-2026-2577: Missing authentication for critical function vulnerability

The WhatsApp bridge component in Nanobot binds the WebSocket server to all network interfaces (0.0.0.0) on port 3001 by default and does not require authentication for incoming connections. An unauthenticated remote attacker with network access to the bridge can connect to the WebSocket server to hijack the WhatsApp session. This allows the attacker to send messages on behalf of the user, intercept all incoming messages and media in real-time, and capture authentication QR codes.

10.0 CVSS 3.1 Critical EPSS 0.68% · top 49.6% CWE-306 · Missing authentication for critical function Deferred
10.0CVSS 3.1 base score
0.68%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

Description

The WhatsApp bridge component in Nanobot binds the WebSocket server to all network interfaces (0.0.0.0) on port 3001 by default and does not require authentication for incoming connections. An unauthenticated remote attacker with network access to the bridge can connect to the WebSocket server to hijack the WhatsApp session. This allows the attacker to send messages on behalf of the user, intercept all incoming messages and media in real-time, and capture authentication QR codes.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N

References

LinkTags
https://github.com/HKUDS/nanobot/releases/tag/v0.1.3.post7
https://www.tenable.com/security/research/tra-2026-09

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Source: NIST National Vulnerability Database (record CVE-2026-2577), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.