---
id: CVE-2026-84856
title: A vulnerability was detected in rowboatlabs rowboat up to 0.9.1
summary: >-
  A vulnerability was detected in rowboatlabs rowboat up to 0.9.1. The impacted
  element is the function request.text/req.json of the file
  apps/rowboat/app/api/composio/webhook/route.ts of the component Composio
  Webhook Endpoint. The manipu…
severity: medium
cvss: 5.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L'
cwe:
  - CWE-404
published: '2026-09-02'
updated: '2026-09-28'
sourceUpdated: '2026-09-28T23:10:00.143'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-84856'
references:
  - url: >-
      https://github.com/hackerguopeng/cve/tree/main/Rowboat_PreAuth_Body_Buffer_DoS_Report
    label: cna@vuldb.com
  - url: 'https://github.com/rowboatlabs/rowboat/releases/tag/v0.9.2'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/cve/CVE-2026-84856'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/submit/886260'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/vuln/398131'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/vuln/398131/cti'
    label: cna@vuldb.com
tags:
  - nvd
ingestedAt: '2026-09-28T23:23:00.556Z'
---

## Overview

A vulnerability was detected in rowboatlabs rowboat up to 0.9.1. The impacted element is the function request.text/req.json of the file apps/rowboat/app/api/composio/webhook/route.ts of the component Composio Webhook Endpoint. The manipulation results in denial of service. It is possible to launch the attack remotely. The exploit is now public and may be used. Upgrading to version 0.9.2 is sufficient to resolve this issue. Upgrading the affected component is recommended. The legacy Next.js app was deleted at 0.9.2 rather than patched, leaving no security control behind.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.