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.
CVE-2026-104054
MEDIUMPre-NVD 6.36.3—Trending — 5 sources updated this weekElevated
EchelonGraph scoreHIGH confidence
Score 6.3 from GitHub Security Advisory (severity: LOW) published 2026-10-02. A secondary CVSS source baseline 6.3; sources differ by 0.0.
Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
6.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
- Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 6.3Exploit: Elevated riskExposed services: Not assessed
No fix is confirmed yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for the fix.
- CVSS v3
- 6.3
- EG Score
- 6.3MEDIUMhigh confidence
- EG Risk
- 44EG Risk 44/100CISA SSVC
EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).
How it’s computedSeverity63% × 45%Exploitation40% × 40%Automatability0% × 15%CISA SSVC: Track at low or medium mission impact; Track* at high (mission-essential systems).Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix. - EPSS PROB
- 0.2%
- EPSS %ILE
- 10th
- KEV
- Not listed
CISA SSVCTrack at low or medium mission impact; Track* at high (mission-essential systems).
No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.
Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table
Published
October 2, 2026
Last Modified
October 2, 2026
Advisory Details (3)
Auto-updated Oct 2, 2026No patch confirmed yet. Sources: github_pr.
generic
GitHub - calcom/cal.diy: Scheduling infrastructure for absolutely everyone. · GitHub
https://github.com/calcom/cal.diy/github_pr
fix(security): replace allow-all PermissionCheckService stubs with real membership checks
Upstream fix in progress (PR #30253 · calcom/cal.diy, state=open)
https://github.com/calcom/cal.diy/pull/30253generic
PBAC permission engine shipped as allow-all stubs in the public tree (broken access control) · Issue #29802 · calcom/cal.diy · GitHub
https://github.com/calcom/cal.diy/issues/29802Vendor Advisories for CVE-2026-104054(1)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
Weakness Classification(2)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 13× in last 7d / 13× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
- 2026-10-03 21:24 UTCEG score recompute
- 2026-10-03 21:24 UTCGHSA enrichment
- 2026-10-03 14:25 UTCEPSS rescore
- 2026-10-02 20:20 UTCEG score recompute
- 2026-10-02 20:20 UTCGHSA enrichment
- 2026-10-02 20:20 UTCNVD updateCVSS v4 → 2.1
- 2026-10-02 20:04 UTCEG score recompute
- 2026-10-02 20:03 UTCGHSA enrichment
- 2026-10-02 20:00 UTCMITRE cvelistV5CVSS v4 → 5.3
- 2026-10-02 02:27 UTCEG score recompute
- 2026-10-02 02:27 UTCNVD updateCVSS v4 → 2.1
- 2026-10-02 02:13 UTCEG score recompute
- 2026-10-02 02:10 UTCMITRE cvelistV5first tracked
Related CVEs(same CWE)
Frequently asked(5)
What is CVE-2026-104054?
CVE-2026-104054 is a medium vulnerability published on October 2, 2026. 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.…
When was CVE-2026-104054 disclosed?
CVE-2026-104054 was first published on October 2, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-104054 actively exploited?
CVE-2026-104054 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (10th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-104054?
CVE-2026-104054 has a CVSS base score of 6.3 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-104054?
No fix for CVE-2026-104054 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The vendor advisories EchelonGraph has for CVE-2026-104054 are linked in the Vendor Advisories panel on this page.
Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2026-104054
Is Your Infrastructure Affected by CVE-2026-104054?
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