Medium 5.3Published Sep 2, 2026

CVE-2026-84856rowboatlabs rowboat Composio Webhook Endpoint route.ts req.json denial of service

Updated under an hour ago (2026-10-19 08:23 UTC)

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It affects rowboatlabs rowboat. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for rowboatlabs rowboat

Exploited in the last 30 days

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.

CVSS: 5.3 MEDIUM (v3.1, CNA)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
Weakness (CWE): CWE-404
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: VulDB
NVD analysis: Deferred
Record last updated: Sep 3, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

rowboatlabs rowboat rowboatlabs:rowboat	0.9.0; 0.9.1; 0.9.2 not affected	CNA record

References

https://vuldb.com/vuln/398131vdb-entry, technical-description
https://vuldb.com/vuln/398131/ctisignature, permissions-required
https://vuldb.com/cve/CVE-2026-84856third-party-advisory
https://vuldb.com/submit/886260third-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

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.