CVE-2026-9304— calcom cal.diy Logo API route.ts validateUrlForSSRF server-side request forgery
Possible ATT&CK Techniques 1AI
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I. Basic Information for CVE-2026-9304
Vulnerability Information
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Vulnerability Title
calcom cal.diy Logo API route.ts validateUrlForSSRF server-side request forgery
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L
Source: NVD (National Vulnerability Database)
Vulnerability Type
服务端请求伪造(SSRF)
Source: NVD (National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2026-9304
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Proof of Concept for CVE-2026-9304 (1)
IV. Related Vulnerabilities
Same vendor: calcom
- CVE-2026-9349
calcom cal.diy Generic React API bookings-single-view.getSer - CVE-2026-9303
calcom cal.diy cross-site request forgery - CVE-2026-23478
Cal.com has an Authentication Bypass via Unvalidated Email i - CVE-2025-66489
Cal.com Authentication Bypass via bad TOTP + password checks - CVE-2023-37919
Cal.com not expiring old sessions after enabling 2FA
Same weakness: CWE-918
- CVE-2026-9312
Server-Side Request Forgery vulnerability in GitHub Enterpri - CVE-2026-8606
Server-Side Request Forgery in GitHub Enterprise Server via - CVE-2026-45298
Dozzle: Pre-auth SSRF with response-body reflection via POST - CVE-2026-45412
MaxKB: Unauthenticated SSRF via Workflow Template Import - CVE-2026-42335
MaxKB: SSRF Bypass in MaxKB OSS URL Fetch due to URL Parsing
V. Comments for CVE-2026-9304
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