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TI-2023-01550 Aliases CVE-2023-1647GHSA-976q-qhh2-p88c

Improper Access Control in calcom/cal.com

Priority MEDIUM 42CWE-284Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-284.

Summary

Improper Access Control in GitHub repository calcom/cal.com prior to 2.7.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00842 58th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed calcom/cal.com (calcom): 2.7

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
calcomcalcom/cal.combefore 2.72.7Patch availableCNA
  • calcom/cal.com Vendorcalcom Affected before 2.7 Fixed in 2.7 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:cal:cal.com:*:*:*:*:*:*:*:*before 2.7.0Vulnerablecalcom
  • cpe:2.3:a:cal:cal.com:*:*:*:*:*:*:*:* Versions before 2.7.0 Vulnerable ·calcom

Remediation

  • Fix · CNA calcom/cal.com (calcom) Fixed in 2.7

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-1647
  2. 2026-10-03 Alias added: GHSA-976q-qhh2-p88c

References

Exploit 1

Patch 1

  • TI-2023-19352 Cal.com not expiring old sessions after enabling 2FA CVSS 3.1MEDIUM 6.5
  • TI-2026-18911 Cal.com has an Authentication Bypass via Unvalidated Email in Custom JWT Callback CVSS 4.0CRITICAL 10.0
  • TI-2025-40913 Cal.com Authentication Bypass via bad TOTP + password checks CVSS 4.0CRITICAL 9.9

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences