CVE-2026-9304CWE-918

calcom cal.diy Logo API route.ts validateUrlForSSRF server-side request forgery

Low · published May 23, 2026

CVSS v4.0
2.3
EPSS
0%
Percentile
23.8
In the wild
Unconfirmed
What it is

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 request forgery. It is possible to launch the attack remotely. Attacks of this nature are highly complex. The exploitability is described as difficult. The exploit has been released to the public and may be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.

The record
Technical detail
CVSS v4.0
2.3 · LOW
Vector
CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
EPSS
0.00320 · 23.8th percentile
Weakness
CWE-918 · Server-Side Request Forgery (SSRF)
Published
2026-05-23T13:45Z
EPSS history
Timeline
  • 23 MAY 13:45Z
    calcom cal.diy Logo API route.ts validateUrlForSSRF server-side request forgery
    cvelistv5