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TI-2026-08170 Aliases CVE-2026-9304GHSA-6c7x-v3mr-g29x

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

Priority MEDIUM 45CWE-918Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
High
Attack requirements
None
Impact type
—
Confidentiality · integrity · availability
Low · Low · Low
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00199 9th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
calcomcal.diy4.9.0; 4.9.1; 4.9.2; 4.9.3; 4.9.4—No fix listedCNA
  • cal.diy Vendorcalcom Affected 4.9.0; 4.9.1; 4.9.2; 4.9.3; 4.9.4 Fixed in — No fix listed CNA

CPE names CNA · 1

CPEVersionsRoleVendor
cpe:2.3:a:calcom:cal.diy:*:*:*:*:*:*:*:*———
  • cpe:2.3:a:calcom:cal.diy:*:*:*:*:*:*:*:* Versions — — ·—

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-9304
  2. 2026-10-03 Alias added: GHSA-6c7x-v3mr-g29x

References

Exploit 1

  • TI-2024-38439 Cal.com through 4.7.15 Cross-Site Scripting via booking questions CVSS 4.0CRITICAL 9.3
  • TI-2024-38437 Cal.com through 4.7.15 Cross-Site Scripting via booking questions CVSS 4.0CRITICAL 9.3
  • TI-2024-38438 cal.com Repository Takeover via pull_request_target Workflow CVSS 4.0HIGH 8.5
  • TI-2026-08199 calcom cal.diy Generic React API bookings-single-view.getServerSideProps.tsx getServerSideProps information disclosure CVSS 4.0MEDIUM 6.9
  • TI-2023-19352 Cal.com not expiring old sessions after enabling 2FA CVSS 3.1MEDIUM 6.5
  • TI-2026-76231 Authorization bypass in cal.com and cal.diy webhook handler CVSS 4.0MEDIUM 5.3
See all 14 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences