CVE-2026-9349 Details
Description
A vulnerability was determined in calcom cal.diy up to 4.9.4. Affected by this issue is the function getServerSideProps of the file apps/web/modules/bookings/views/bookings-single-view.getServerSideProps.tsx of the component Generic React API. This manipulation of the argument cancelledBy/rescheduledBy causes information disclosure. The attack can be initiated remotely. The exploit has been publicly disclosed and may be utilized. The vendor was contacted early about this disclosure but did not respond in any way.
A vulnerability in Cal.com versions through 4.9.4 allows for unauthorized access to organizer email addresses via the booking management feature. The issue arises in the 'getServerSideProps' function of the 'bookings-single-view' module, where the 'cancelledBy' and 'rescheduledBy' properties of the booking information are improperly sanitized before being sent to the client. This flaw enables unauthenticated users to retrieve private email details, bypassing the application's privacy controls designed to protect organizer identities during scheduling interactions.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed May 24, 2026CISA-ADP
Assessed May 26, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://gist.github.com/YLChen-007/b59c44d1550c4b0f373ca4eb1c150994 | [email protected] | ExploitTechnical Description |
| https://vuldb.com/submit/812177 | [email protected] | Permission Required |
| https://vuldb.com/vuln/365312 | [email protected] | AdvisoryPermission Required |
| https://vuldb.com/vuln/365312/cti | [email protected] | AdvisoryPermission Required |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-200 | Exposure of Sensitive Information to an Unauthorized Actor | [email protected] |
| CWE-284 | Improper Access Control | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| cal.com | <= 4.9.4 (semver) |
CPE
Remediation
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Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 23, 2026 | CVE Translated | [email protected] |
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| May 24, 2026 | New CVE Received | [email protected] |