What’s Vulnerable › Vulnerabilities

CVE-2026-2577: Nanobot Unauthenticated WhatsApp Session Hijack via WebSocket Bridge

• Severity: critical (CVSS 10.0 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-02-16 · updated 2026-06-17
• Weakness: CWE-306

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.

Affected products

• HKUDS nanobot: before 0.1.3.Post7 — fixed in 0.1.3.Post7

How to fix

Upgrade to a fixed version: HKUDS nanobot 0.1.3.Post7. Check the vendor advisory for mitigations.

References

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

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