cal.diy 6.2.0 Conferencing OAuth Callback Open Redirect via Unsigned State (CVE-2026-63768) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-63768

cal.diy 6.2.0 Conferencing OAuth Callback Open Redirect via Unsigned State

Answer in brief

CVE-2026-63768 records a Unknown severity vulnerability in cal.diy 6.2.0 Conferencing OAuth Callback Open Redirect via Unsigned State. The current sources do not mark it as known exploited. The current feed maps calcom/cal.diy (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Jul 20, 2026Updated Sep 17, 2026Source checked Sep 17, 2026First seen by HOL Sep 17, 2026Material review Sep 17, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Not reported

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps calcom/cal.diy (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
calcom/cal.diygeneric	0	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for calcom/cal.diy.
Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

Published upstream
Jul 20, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 17, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 17, 2026

Sources and claim methodology

Upstream source description

cal.diy through 6.2.0 contains an open redirect vulnerability in the conferencing OAuth callback endpoint that allows attackers to redirect users to arbitrary URLs by crafting malicious state parameters. Attackers can exploit the unsigned state parameter and onErrorReturnTo field to silently redirect visitors from the trusted domain to attacker-controlled URLs for phishing attacks.

Quoted source text, attributed separately from HOL analysis.