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CVE-2026-9304

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

MEDIUM
5
CVSS Score
Published: May 23, 2026 at 01:45 PM UTC
Updated: July 23, 2026 at 07:32 PM UTC
1 product affected across 1 vendorCal.diy

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Severity
MEDIUM5
Exploit prediction
EPSS 0.2%
SSVC
PoC

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (4)

VDB EntryTechnical Description
Source: cverecord
https://vuldb.com/vuln/365251
SignaturePermissions Required
Source: cverecord
https://vuldb.com/vuln/365251/cti
Third Party Advisory
Source: cverecord
https://vuldb.com/submit/812176
Exploit
Source: cverecord
https://gist.github.com/YLChen-007/b3d0b85767b7e346a291933d602fbb3b

SSVC — Action Prioritization

SSVCPoCNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5MEDIUMVulDB
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-918

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