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CVE-2025-71389

CRITICAL
10.0
CVSS 3.1
Description
Cal.com (calcom/cal.diy) before 5.9.9 is vulnerable to unauthenticated remote code execution because it bundles a version of Next.js whose React Server Components (RSC) request handling deserializes attacker-controlled input. A remote attacker can send a crafted RSC request to the server and cause arbitrary code to be executed during server-side processing, without authentication or user interaction. The flaw derives from the upstream Next.js vulnerability CVE-2025-55182 and is resolved in 5.9.9 by updating the affected dependency.

Metadata

CVE ID
CVE-2025-71389
State
PUBLISHED
Assigner
VulnCheck
Reserved
2026-07-16 12:14 UTC
Published
2026-07-23 21:16 UTC
Last updated
2026-07-23 21:16 UTC
Primary CWE
CWE-94
Improper Control of Generation of Code ('Code Injection')
Vendor / Product
calcom / cal.diy
Sources
cve.org  ·  NVD

Severity & Metrics

10.0 CRITICAL CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Affected products (1)
VendorProductPlatformVersions
calcom cal.diy — 0 < 5.9.9, 5.9.9
Weakness (CWE)
CWESourceDescription
CWE-94 cna Improper Control of Generation of Code ('Code Injection')
CVSS scores (2)
ScoreSeverityVersionSourceVector
10.0 CRITICAL 4.0 cna CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
10.0 CRITICAL 3.1 cna CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
References (4)
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