What is CVE-2026-9304?

CVE-2026-9304 is a medium-severity vulnerability in Calcom Cal.diy, classified under Server-Side Request Forgery (SSRF). CVSS score: 5.0/10. Published 2026-05-23.

How severe is CVE-2026-9304?

Medium severity. CVSS v3 base score is 5.0 out of 10.

SSRF in Calcom Cal.diy

CVE-2026-9304

A security flaw has been discovered in calcom cal.diy up to 4.9.4. The affected element is the function validateUrlForSSRF of the file apps/web/app/api/logo/route.ts of the component Logo API. The manipulation results in server-side reques…

Vulnerability class: SSRF (Server-Side Request Forgery)

EPSS: 0.000 (11.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.0 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L.

Affected products

Calcom Cal.diy — versions 4.9.0, 4.9.1, 4.9.2

Weakness classification (CWE)

CWE-918 — Server-Side Request Forgery (SSRF)

References

cna@vuldb.com (technical-description, vdb-entry)
cna@vuldb.com (signature, permissions-required)
cna@vuldb.com (third-party-advisory)
cna@vuldb.com (exploit)

Frequently asked questions

What is CVE-2026-9304?: CVE-2026-9304 is a medium-severity vulnerability in Calcom Cal.diy, classified under Server-Side Request Forgery (SSRF). CVSS score: 5.0/10. Published 2026-05-23.
How severe is CVE-2026-9304?: Medium severity. CVSS v3 base score is 5.0 out of 10.