CVE-2026-121582 PUBLISHED

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.

• waterhunter (VulDB User) reporter
• VulDB CNA Team coordinator

• VDB-430425 | Umami Record API Endpoint route.ts authorization
• VDB-430425 | CTI Indicators (IOB, IOC, IOA)
• CVE-2026-121582 | CVE Analysis and Report
• Submit #1019998 | umami-software umami 3.4.0 Improper Access Control
• https://github.com/waterhunter2000-svg/vulnerability-reports
• https://github.com/umami-software/umami/security/advisories/GHSA-4cww-5p37-v8r2
• https://github.com/waterhunter2000-svg/vulnerability-reports/blob/main/02-umami-record-unauth-write.md

• Authorization Bypass CWE
• Improper Authorization CWE