# CVE-2026-84856

## Summary

- **CVE ID:** CVE-2026-84856
- **Severity:** MEDIUM
- **CVSS Score:** 6.9 (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)
- **CWE:** CWE-404
- **Published:** Sep 2, 2026
- **Last Modified:** Sep 3, 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.

## Affected Products

- rowboatlabs — rowboat (0.9.0)
- rowboatlabs — rowboat (0.9.1)
- rowboatlabs — rowboat (0.9.2)

## References

- [CNA](https://vuldb.com/vuln/398131)
- [CNA](https://vuldb.com/vuln/398131/cti)
- [CNA](https://vuldb.com/cve/CVE-2026-84856)
- [CNA](https://vuldb.com/submit/886260)
- [CNA](https://github.com/hackerguopeng/cve/tree/main/Rowboat_PreAuth_Body_Buffer_DoS_Report)
- [CNA](https://github.com/rowboatlabs/rowboat/releases/tag/v0.9.2)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.40%
- **EPSS Percentile:** 34.0

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._