CVE-2026-9304
calcom cal.diy Logo API route.ts validateUrlForSSRF server-side request forgery
- State
- Published
- Severity
- 2.3 Low
- Published
- May 23, 2026
- Updated
- May 26, 2026
- Reserved
- May 22, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 2.3 Low | 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 | VulDB |
| 3.1 | 5.0 Medium | 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 | VulDB |
| 3.0 | 5.0 Medium | CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R | VulDB |
| 2.0 | 4.6 Medium | AV:N/AC:H/Au:S/C:P/I:P/A:P/E:POC/RL:ND/RC:UR | VulDB |
Weaknesses
- CWE-918 Server-Side Request Forgery
Affected Products
| Product | Versions |
|---|---|
cal.diycalcom |
|
References
- VDB-365251 | calcom cal.diy Logo API route.ts validateUrlForSSRF server-side request forgeryvdb-entrytechnical-description
- VDB-365251 | CTI Indicators (IOB, IOC, IOA)signaturepermissions-required
- Submit #812176 | cal.com <= v4.9.4 Server-Side Request Forgery (CWE-918)third-party-advisory
- https://gist.github.com/YLChen-007/b3d0b85767b7e346a291933d602fbb3bexploit
Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.