CVE-2026-2577 Nanobot Unauthenticated WhatsApp Session Hijack via WebSocket Bridge
Unauthenticated remote attackers can hijack WhatsApp sessions via the default WebSocket bridge to send messages, intercept data, and capture QR codes.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-2577?
CVE-2026-2577 is a critical missing authorization vulnerability in HKUDS nanobot, published on 16 Feb 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-306
Which versions are affected by CVE-2026-2577?
How do I fix CVE-2026-2577?
No fix has been published for CVE-2026-2577 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-2577 being exploited?
There is no known exploitation of CVE-2026-2577 in the wild and no public exploit code.
Sources
Also known as GHSA-3g85-xpc2-p2hq.