PT-2026-42884 · Cal.Com · Cal.Diy

Eric-Z · Published 2026-05-23 · Updated 2026-05-23 · CVE-2026-9304

Mitre

CVSS v3.1

5.0

Medium

Base vector

AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L

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.

Exploit

SSRF

Weakness Enumeration

CWE-918

Related Identifiers

CVE-2026-9304

Affected Products

Cal.Diy

References · 4

• 🔥 https://gist.github.com/YLChen-007/b3d0b85767b7e346a291933d602fbb3b · Exploit
• https://vuldb.com/vuln/365251 · Note
• https://vuldb.com/vuln/365251/cti · Note
• https://vuldb.com/submit/812176 · Note