# CVE-2026-121582: Umami Record API Endpoint route.ts authorization

Status: published. Published: 2026-11-03. Updated: 2026-11-03.

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.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- n/a / Umami: 3.4.0 (affected); 3.4.1 (affected). Source: CNA: VulDB

## Severity and prioritization

- CVSS 4.0: 6.9 (medium); CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/E:P; source: CNA: VulDB

- CVSS 3.1: 6.5 (medium); CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L/E:P/RL:X/RC:C; source: CNA: VulDB

- CVSS 3.0: 6.5 (medium); CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L/E:P/RL:X/RC:C; source: CNA: VulDB

- CVSS 2.0: 6.4 (medium); AV:N/AC:L/Au:N/C:N/I:P/A:P/E:POC/RL:ND/RC:C; source: CNA: VulDB

- CVSS 4.0: 5.5 (medium); CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X; source: NVD: cna@vuldb.com

- CVSS 3.1: 6.5 (medium); CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L; source: NVD: cna@vuldb.com

- CVSS 2.0: 6.4 (medium); AV:N/AC:L/Au:N/C:N/I:P/A:P; source: NVD: cna@vuldb.com

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-639, CWE-285

## Exploit evidence

- exploit: https://github.com/waterhunter2000-svg/vulnerability-reports/blob/main/02-umami-record-unauth-write.md (CNA: VulDB)

## References

- https://vuldb.com/vuln/430425 (CNA: VulDB; vdb-entry, technical-description)

- https://vuldb.com/vuln/430425/cti (CNA: VulDB; signature, permissions-required)

- https://vuldb.com/cve/CVE-2026-121582 (CNA: VulDB; third-party-advisory)

- https://vuldb.com/submit/1019998 (CNA: VulDB; third-party-advisory)

- https://github.com/waterhunter2000-svg/vulnerability-reports (CNA: VulDB; related)

- https://github.com/umami-software/umami/security/advisories/GHSA-4cww-5p37-v8r2 (CNA: VulDB; broken-link)

- https://github.com/waterhunter2000-svg/vulnerability-reports/blob/main/02-umami-record-unauth-write.md (CNA: VulDB; exploit)

- https://github.com/umami-software/umami/security/advisories/GHSA-4cww-5p37-v8r2 (cna@vuldb.com)

- https://github.com/waterhunter2000-svg/vulnerability-reports (cna@vuldb.com)

- https://github.com/waterhunter2000-svg/vulnerability-reports/blob/main/02-umami-record-unauth-write.md (cna@vuldb.com)

- https://vuldb.com/cve/CVE-2026-121582 (cna@vuldb.com)

- https://vuldb.com/submit/1019998 (cna@vuldb.com)

- https://vuldb.com/vuln/430425 (cna@vuldb.com)

- https://vuldb.com/vuln/430425/cti (cna@vuldb.com)

## Provenance

- CNA: VulDB: https://www.cve.org/CVERecord?id=CVE-2026-121582; retrieved 2026-11-03; source updated 2026-11-03

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-121582; retrieved 2026-11-04; source updated 2026-11-03

Revision: 9b476cdb004a68c1f39ccb073afe1db277f47a16e403c90b6679d018667841e8

Canonical: https://y2.dev/cve/CVE-2026-121582

## Agent and API access

Public CVE pages, Markdown, and JSON are free to read without an account or API key.

- Public catalog: https://y2.dev/cve/index.json. Follow nextCursor with the same search, filters, sort, and limit (1–100). A null cursor marks the end.

- WebMCP: search_cve_disclosures, get_cve_disclosure, get_cve_page_markdown, get_y2_cve_access. Available in compatible browsers.

- Cyber API: https://api.y2.dev/api/v2/cyber/cves and https://api.y2.dev/api/v2/cyber/cves/{cveId}.

- Y2 Pro or Elite: create a workspace API key with the intel:cyber scope and send Authorization: Bearer <Y2_API_KEY>. Setup: https://y2.dev/docs/api/create-key.

- x402: Pay per request without an account or API key. Omit Authorization, read the HTTP 402 PAYMENT-REQUIRED challenge, validate its current requirements, and retry with PAYMENT-SIGNATURE through an authorized payment client. These browser tools never make payments. Guide: https://y2.dev/docs/api/x402.

- OpenAPI: https://y2.dev/api/openapi.yaml. Agent access metadata: https://y2.dev/cve/agent.json.

Collected public records only. Check source status for coverage and freshness.