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CVE-2026-9303— calcom cal.diy cross-site request forgery

CVSS 4.3 · Medium EPSS 0.02% · P5

Possible ATT&CK Techniques 1AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 5

VendorProductVersion RangeStatus
calcomcal.diy4.9.0affected
4.9.1affected
4.9.2affected
4.9.3affected
4.9.4affected
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I. Basic Information for CVE-2026-9303

Vulnerability Information
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Vulnerability Title
calcom cal.diy cross-site request forgery
Source: NVD (National Vulnerability Database)
Vulnerability Description
A vulnerability was identified in calcom cal.diy up to 4.9.4. Impacted is an unknown function. The manipulation leads to cross-site request forgery. It is possible to initiate the attack remotely. The exploit is publicly available and might be used. 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:R/S:U/C:N/I:L/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
跨站请求伪造(CSRF)
Source: NVD (National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
calcomcal.diy 4.9.0 cpe:2.3:a:calcom:cal.diy:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-9303

#POC DescriptionSource LinkShenlong Link
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III. Intelligence Information for CVE-2026-9303

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Proof of Concept for CVE-2026-9303 (2)

IV. Related Vulnerabilities

Same product: cal.diy
Same vendor: calcom
Same weakness: CWE-352

V. Comments for CVE-2026-9303

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