CVE-2026-23478CRITICAL 9.8EPSS p31.7%
CVE-2026-23478CVE-2026-23478
Description
Cal.com is open-source scheduling software. From 3.1.6 to before 6.0.7, there is a vulnerability in a custom NextAuth JWT callback that allows attackers to gain full authenticated access to any user's account by supplying a target email address via session.update(). This vulnerability is fixed in 6.0.7.
Scoring
| CVSS 3.1 | 9.8 (CRITICAL) |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| EPSS | 0.40% probability of exploitation · percentile 31.7% · 2026-06-19T12:03:05Z |
| Published | 2026-01-13 |
| Last modified | 2026-02-03 |
Underlying weaknesses· 2
References
2
| Type | Target | Confidence | Tier |
|---|---|---|---|
| Weakness | Client-Side Enforcement of Server-Side Securitycwe-602 | 0% | live |
| Weakness | Authorization Bypass Through User-Controlled Keycwe-639 | 0% | live |
Related by meaning· 6
Nearest entities by semantic similarity across the cs-graph corpus.