MSRXCVE-2026-84856
CVE-2026-84856
rowboatlabs rowboat Composio Webhook Endpoint route.ts req.json denial of service
CVSS 4.0 · CNA
chance of exploitation in the next 30 days (EPSS; higher than 53% of CVEs)
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
Affected products
- rowboatlabs rowboat: 0.9.0; 0.9.1
Weakness: CWE-404
6 references (advisories, patches, write-ups)
- https://vuldb.com/vuln/398131 · vdb-entry, technical-description
- https://vuldb.com/vuln/398131/cti · signature, permissions-required
- https://vuldb.com/cve/CVE-2026-84856 · third-party-advisory
- https://vuldb.com/submit/886260 · third-party-advisory
- https://github.com/hackerguopeng/cve/tree/main/Rowboat_PreAuth_Body_Buffer_DoS_Report · exploit
- https://github.com/rowboatlabs/rowboat/releases/tag/v0.9.2 · patch
Sources: CVE.org, OSV.dev, FIRST EPSS. Missing ones did not answer or have no record yet.