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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.

PUBLISHED Reserved 2026-05-23 | Published 2026-05-24 | Updated 2026-05-26 | Assigner VulDB




MEDIUM: 6.9CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P
MEDIUM: 5.3CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:P/RL:X/RC:R
MEDIUM: 5.3CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:P/RL:X/RC:R
5.0AV:N/AC:L/Au:N/C:P/I:N/A:N/E:POC/RL:ND/RC:UR

Problem types

Information Disclosure

Improper Access Controls

Product status

4.9.0
affected

4.9.1
affected

4.9.2
affected

4.9.3
affected

4.9.4
affected

Timeline

2026-05-23:Advisory disclosed
2026-05-23:VulDB entry created
2026-05-23:VulDB entry last update

Credits

Eric-z (VulDB User) reporter

VulDB CNA Team coordinator

References

vuldb.com/vuln/365312 (VDB-365312 | calcom cal.diy Generic React API bookings-single-view.getServerSideProps.tsx getServerSideProps information disclosure) vdb-entry technical-description

vuldb.com/vuln/365312/cti (VDB-365312 | CTI Indicators (IOB, IOC, TTP, IOA)) signature permissions-required

vuldb.com/submit/812177 (Submit #812177 | cal.com <= v4.9.4 Exposure of Sensitive Information (CWE-200)) third-party-advisory

gist.github.com/YLChen-007/b59c44d1550c4b0f373ca4eb1c150994 exploit

cve.org (CVE-2026-9349)

nvd.nist.gov (CVE-2026-9349)

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