VDB-398131 · Submit #886260 · CVE-2026-84856

rowboatlabs rowboat up to 0.9.1 Composio Webhook Endpoint route.ts request.text/req.json denial of service

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
4.8	$0-$5k	2.54

Summaryinfo

A vulnerability classified as problematic has been found in rowboatlabs rowboat up to 0.9.1. This affects the function request.text/req.json of the file apps/rowboat/app/api/composio/webhook/route.ts of the component Composio Webhook Endpoint. This manipulation causes denial of service. This vulnerability is handled as CVE-2026-84856. The attack can be initiated remotely. Additionally, an exploit exists. It is recommended to upgrade the affected component. The legacy Next.js app was deleted at 0.9.2 rather than patched, leaving no security control behind.

Detailsinfo

A vulnerability was found in rowboatlabs rowboat up to 0.9.1. It has been declared as problematic. Affected by this vulnerability 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 with an unknown input leads to a denial of service vulnerability. The CWE definition for the vulnerability is CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. As an impact it is known to affect availability.

It is possible to read the advisory at github.com. This vulnerability is known as CVE-2026-84856. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details and also a public exploit are known. The attack technique deployed by this issue is T1499 according to MITRE ATT&CK.

It is possible to download the exploit at github.com. It is declared as proof-of-concept. The legacy Next.js app was deleted at 0.9.2 rather than patched, leaving no security control behind.

Upgrading to version 0.9.2 eliminates this vulnerability. The upgrade is hosted for download at github.com.

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Vendor

rowboatlabs

Name

rowboat

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 4.8

VulDB Base Score: 5.3
VulDB Temp Score: 4.8
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AV	AC	Au	C	I	A
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💳	💳	💳	💳	💳	💳
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Denial of service
CWE: CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Access: Public
Status: Proof-of-Concept
Download: 🔒
Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: rowboat 0.9.2

Timelineinfo

09/02/2026 Advisory disclosed
09/02/2026 +0 days VulDB entry created
09/02/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: github.com
Status: Confirmed

CVE: CVE-2026-84856 (🔒)
GCVE (CVE): GCVE-0-2026-84856
GCVE (VulDB): GCVE-100-398131
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 09/02/2026 15:26
Changes: 09/02/2026 15:26 (60)
Complete: 🔍
Submitter: hackerguopeng
Cache ID: 216::103

Submitinfo

Accepted

Submit #886260: Rowboat Labs Rowboat 0.1.0 Denial of Service (by hackerguopeng)