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CVE-2026-104054— calcom cal.diy PBAC Permission BookingAccessService.ts doesUserIdHaveAccessToBooking authorization

Quick assessment

Affected
calcom cal.diy
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 Cal.com 版本 6.2.0 及更低版本中，发现了一个安全漏洞。该漏洞影响了组件 PBAC Permission Engine 中的 BookingAccessService.ts 文件下的 doesUserIdHaveAccessToBooking 函数。通过恶意操纵可导致权限缺失。攻击者可远程发起攻击。该漏洞的利用代码已公开，可能被用于实际攻击。目前，修复该问题的 Pull Request 已提交，等待审核接受。

CVSS 6.3 · Medium EPSS 0.21% · P10

Possible ATT&CK Techniques 1 AI

T1078 · Valid Accounts

Affected Version Matrix 3

VendorProduct Version RangeStatus
calcom cal.diy 6.0 affected
6.1 affected
6.2.0 affected
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I. Basic Information for CVE-2026-104054

Vulnerability Information
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Vulnerability Title
calcom cal.diy PBAC Permission BookingAccessService.ts doesUserIdHaveAccessToBooking authorization
Source: CVE Program / CVE List V5
Vulnerability Description
A security flaw has been discovered in calcom cal.diy up to 6.2.0. This affects the function doesUserIdHaveAccessToBooking of the file BookingAccessService.ts of the component PBAC Permission Engine. Performing a manipulation results in missing authorization. The attack can be initiated remotely. The exploit has been released to the public and may be used for attacks. The pull request to fix this issue awaits acceptance.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
calcom cal.diy 6.0 cpe:2.3:a:calcom:cal.diy:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-104054

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III. Intelligence Information for CVE-2026-104054

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Patches & Fixes for CVE-2026-104054 (1)

Other References for CVE-2026-104054 (1)

IV. Related Vulnerabilities

Same product: cal.diy
Same vendor: calcom
Same weakness: CWE-862

V. Comments for CVE-2026-104054

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