CVE-2026-84856

rowboatlabs rowboat Composio Webhook Endpoint route.ts req.json denial of service

State: Published
Severity: 6.9 Medium
Published: Sep 2, 2026
Updated: Sep 3, 2026
Reserved: Sep 2, 2026

Description

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.

Scores

CVSS	Score	Vector	Source
4.0	6.9 Medium	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P	VulDB
3.1	5.3 Medium	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C	VulDB
3.0	5.3 Medium	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C	VulDB
2.0	5.0 Medium	AV:N/AC:L/Au:N/C:N/I:N/A:P/E:POC/RL:OF/RC:C	VulDB

Weaknesses

CWE-404 Denial of Service

Affected Products

Product	Versions
rowboatrowboatlabs	0.9.0Affected 0.9.1Affected 0.9.2Not affected

References

VDB-398131 | rowboatlabs rowboat Composio Webhook Endpoint route.ts req.json denial of servicevdb-entrytechnical-description
VDB-398131 | CTI Indicators (IOB, IOC, TTP, IOA)signaturepermissions-required
CVE-2026-84856 | CVE Analysis and Reportthird-party-advisory
Submit #886260 | Rowboat Labs Rowboat 0.1.0 Denial of Servicethird-party-advisory
https://github.com/hackerguopeng/cve/tree/main/Rowboat_PreAuth_Body_Buffer_DoS_Reportexploit
https://github.com/rowboatlabs/rowboat/releases/tag/v0.9.2patch

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