CVE-2026-9349— calcom cal.diy Generic React API bookings-single-view.getServerSideProps.tsx getServerSideProps information disclosure

CVSS 5.3 · Medium EPSS 0.03% · P9 Updated May 26, 2026

Possible ATT&CK Techniques 1AI

Affected Version Matrix 5

Vendor	Product	Version Range	Status
calcom	cal.diy	`4.9.0`	affected
		`4.9.1`	affected
		`4.9.2`	affected
		`4.9.3`	affected
		`4.9.4`	affected

Get alerts for future matching vulnerabilitiesLog in to subscribe

I. Basic Information for CVE-2026-9349

Vulnerability Information

Have questions about the vulnerability? See if Shenlong's analysis helps!

View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title

calcom cal.diy Generic React API bookings-single-view.getServerSideProps.tsx getServerSideProps information disclosure

Source: NVD (National Vulnerability Database)

Vulnerability 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.

Source: NVD (National Vulnerability Database)

CVSS Information

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Source: NVD (National Vulnerability Database)

Vulnerability Type

信息暴露

Source: NVD (National Vulnerability Database)

Vulnerability Title

cal.diy 访问控制错误漏洞

Source: CNNVD (China National Vulnerability Database)

Vulnerability Description

cal.diy是Cal开源的一个开源日程调度平台。 cal.diy 4.9.4及之前版本存在访问控制错误漏洞，该漏洞源于Generic React API组件文件apps/web/modules/bookings/views/bookings-single-view.getServerSideProps.tsx中函数getServerSideProps对参数cancelledBy/rescheduledBy的操作，可能导致信息泄露。

Source: CNNVD (China National Vulnerability Database)

CVSS Information

N/A

Source: CNNVD (China National Vulnerability Database)

Vulnerability Type

N/A

Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
calcom	cal.diy	4.9.0	`cpe:2.3:a:calcom:cal.diy::::::::`

II. Public POCs for CVE-2026-9349

#	POC Description	Source Link	Shenlong Link

AI-Generated POCPremium

No public POC found.

III. Intelligence Information for CVE-2026-9349

请登录查看更多情报信息。

Proof of Concept for CVE-2026-9349 (1)

🔗 Information Leak of Organizer Email via Booking Responses (Bypass of `hideOrganizerEmail`) · GitHub Read full article exploit

https://nvd.nist.gov/vuln/detail/CVE-2026-9349

IV. Related Vulnerabilities

Same product: cal.diy

Same vendor: calcom

Same weakness: CWE-200

V. Comments for CVE-2026-9349

No comments yet

Goal Reached Thanks to every supporter — we hit 100%!

CVE-2026-9349— calcom cal.diy Generic React API bookings-single-view.getServerSideProps.tsx getServerSideProps information disclosure

Possible ATT&CK Techniques 1AI

Affected Version Matrix 5

I. Basic Information for CVE-2026-9349

Vulnerability Information

Vulnerability Title

Vulnerability Description

CVSS Information

Vulnerability Type

Vulnerability Title

Vulnerability Description

CVSS Information

Vulnerability Type

Affected Products

II. Public POCs for CVE-2026-9349

III. Intelligence Information for CVE-2026-9349

Proof of Concept for CVE-2026-9349 (1)

IV. Related Vulnerabilities

V. Comments for CVE-2026-9349

Leave a comment