Authentication Bypass Vulnerability in Sipeed PicoClaw Webhook Function
CVE-2026-16083

6.9MEDIUM

Key Information:

Vendor

Sipeed

Status
Picoclaw
Vendor
CVE Published:
18 July 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-16083?

A security flaw exists in the Sipeed PicoClaw up to version 0.2.9, specifically within the webhook.ParseRequest function located in pkg/channels/line/line.go. This vulnerability allows remote attackers to exploit the authentication mechanism through capture-replay techniques, potentially unlocking unauthorized access. The issue has been publicly disclosed, and users are advised to assess their systems and apply necessary mitigations. Additionally, discussions around this vulnerability on GitHub indicate the issue was marked as 'not planned' for further resolution.

Affected Version(s)

PicoClaw 0.2.0

PicoClaw 0.2.1

PicoClaw 0.2.2

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-16083 - Proof of Concept

References

https://vuldb.com/vuln/379795
vdb-entrytechnical-description
https://vuldb.com/vuln/379795/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-16083
third-party-advisory

CVSS V4

Score:
6.9
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Eric-i (VulDB User)
VulDB CNA Team
.