CVE-2026-2577Network attack vector

WhatsApp session hijack via unauthenticated WebSocket bridge

Published Feb 16, 2026 · Updated Feb 16, 2026

Missing authentication in nanobot before 0.1.3.post7 allows remote attackers to hijack linked WhatsApp sessions via port 3001. The bridge/src/server.ts WebSocket server listens on 0.0.0.0 and accepts connections without authenticating clients. Network access to the bridge is sufficient to send messages as the user, intercept incoming messages and media, and capture login QR codes.

CVSS severity10.0
Critical
EPSS probability0.66%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authentication in nanobot before 0.1.3.post7 allows remote attackers to hijack linked WhatsApp sessions via port 3001. The bridge/src/server.ts WebSocket server listens on 0.0.0.0 and accepts connections without authenticating clients. Network access to the bridge is sufficient to send messages as the user, intercept incoming messages and media, and capture login QR codes.

The record

CVE
CVE-2026-2577
Published
Feb 16, 2026
Updated
Feb 16, 2026
Vendor
Data Intelligence Lab @ HKU
Product
nanobot
Classifications
CWE-306, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 16, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 16, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <0.1.3.Post7

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Data Intelligence Lab @ HKU · nanobotversion=0 <0.1.3.Post7

Published CVSS scores

10.0Tenable Network Security, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N
10.0Tenable Network Security, Inc.CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-306Missing Authentication for Critical Function
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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