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CVE Vulnerability Details :
CVE-2025-71389
PUBLISHED
More InfoOfficial Page
Assigner-VulnCheck
Assigner Org ID-83251b91-4cc7-4094-a5c7-464a1b83ea10
View Known Exploited Vulnerability (KEV) details
Published At-23 Jul, 2026 | 21:16
Updated At-24 Jul, 2026 | 22:07
Rejected At-
▼CVE Numbering Authority (CNA)
Cal.com before 5.9.9 Remote Code Execution via RSC

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.

Affected Products
Vendor
calcom
Product
cal.diy
Default Status
unaffected
Versions
Affected
  • From 0 before 5.9.9 (semver)
Unaffected
  • 5.9.9 (semver)
Problem Types
TypeCWE IDDescription
CWECWE-94Improper Control of Generation of Code ('Code Injection')
Type: CWE
CWE ID: CWE-94
Description: Improper Control of Generation of Code ('Code Injection')
Metrics
VersionBase scoreBase severityVector
4.010.0CRITICAL
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
3.110.0CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Version: 4.0
Base score: 10.0
Base severity: CRITICAL
Vector:
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
Version: 3.1
Base score: 10.0
Base severity: CRITICAL
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://github.com/calcom/cal.diy/security/advisories/GHSA-qjx2-5xqp-cpf4
vendor-advisory
https://github.com/calcom/cal.diy/pull/25592
issue-tracking
patch
https://github.com/advisories/GHSA-9qr9-h5gf-34mp
related
https://www.vulncheck.com/advisories/cal-com-before-remote-code-execution-via-rsc
third-party-advisory
Hyperlink: https://github.com/calcom/cal.diy/security/advisories/GHSA-qjx2-5xqp-cpf4
Resource:
vendor-advisory
Hyperlink: https://github.com/calcom/cal.diy/pull/25592
Resource:
issue-tracking
patch
Hyperlink: https://github.com/advisories/GHSA-9qr9-h5gf-34mp
Resource:
related
Hyperlink: https://www.vulncheck.com/advisories/cal-com-before-remote-code-execution-via-rsc
Resource:
third-party-advisory
▼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
Details not found