CVE-2026-9304

MEDIUM 5.0

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

CVSS Score

5.0

EPSS Score

0.0%

EPSS Percentile

10th

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.

CWE	CWE-918
Vendor	calcom
Product	cal.diy
Published	May 23, 2026
Last Updated	May 26, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Scope

Confidentiality

Integrity

Availability

Affected Versions

calcom / cal.diy

4.9.0 4.9.1 4.9.2 4.9.3 4.9.4

References

NVD ↗ CVE.org ↗ EPSS Data ↗

vuldb.com: https://vuldb.com/vuln/365251 vuldb.com: https://vuldb.com/vuln/365251/cti vuldb.com: https://vuldb.com/submit/812176 gist.github.com: https://gist.github.com/YLChen-007/b3d0b85767b7e346a291933d602fbb3b

Credits

🔍 Eric-z (VulDB User) VulDB CNA Team