CVE-2026-84856

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

MEDIUM
5.3
CVSS Score
Published: September 2, 2026 at 07:45 PM UTC
Updated: September 28, 2026 at 11:10 PM UTC
1 product affected across 1 vendorRowboat

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Severity
MEDIUM5.3
Exploit prediction
EPSS 0.7%
SSVC
PoC

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Vendor states this is fixed in 0.9.2 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (6)

VDB EntryTechnical Description
Source: cverecord
https://vuldb.com/vuln/398131
SignaturePermissions Required
Source: cverecord
https://vuldb.com/vuln/398131/cti
Third Party Advisory
Source: cverecord
https://vuldb.com/cve/CVE-2026-84856
Third Party Advisory
Source: cverecord
https://vuldb.com/submit/886260

SSVC — Action Prioritization

SSVCPoCAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.3MEDIUMVulDB
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-404

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