Denial of Service Vulnerability in Rowboat by Rowboat Labs
CVE-2026-84856

6.9MEDIUM

Key Information:

Vendor

Rowboatlabs

Status
Rowboat
Vendor
CVE Published:
2 September 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-84856?

A vulnerability has been identified in Rowboat Labs’ Rowboat, specifically in the Composio Webhook Endpoint. This issue arises from a flaw in the request handling function located in the code that can lead to denial of service. Attackers can exploit this vulnerability remotely, which could disrupt service availability. To mitigate this risk, users are strongly advised to upgrade to version 0.9.2, where this vulnerability has been effectively addressed. Note that the previous version of the software was removed rather than patched, indicating the urgency of upgrading to maintain security.

Affected Version(s)

rowboat 0.9.0

rowboat 0.9.1

rowboat 0.9.2

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-2026-84856 - Proof of Concept

References

https://vuldb.com/vuln/398131
vdb-entrytechnical-description
https://vuldb.com/vuln/398131/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-84856
third-party-advisory

CVSS V4

Score:
6.9
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
Low
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

hackerguopeng (VulDB User)
VulDB CNA Team
.