CVE-2026-121582

A vulnerability has been found in Umami up to 3.4.1. Impacted is an unknown function of the file src/app/api/record/route.ts of the component Record API Endpoint. Such manipulation of the argument Website leads to authorization bypass. The attack may be launched remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

• CWE-285
• CWE-639

• https://github.com/umami-software/umami/security/advisories/GHSA-4cww-5p37-v8r2
• https://github.com/waterhunter2000-svg/vulnerability-reports
• https://github.com/waterhunter2000-svg/vulnerability-reports/blob/main/02-umami-record-unauth-write.md
• https://vuldb.com/cve/CVE-2026-121582
• https://vuldb.com/submit/1019998
• https://vuldb.com/vuln/430425
• https://vuldb.com/vuln/430425/cti

Published

Nov 3, 2026

Last Modified

Nov 3, 2026

Status

Deferred

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