CVE-2026-24096

Insufficient permission validation on multiple REST API Quick Setup endpoints

5.3 Medium

Insufficient permission validation on multiple REST API Quick Setup endpoints in Checkmk 2.5.0 (beta) before version 2.5.0b2 and 2.4.0 before version 2.4.0p25 allows low-privileged users to perform unauthorized actions or obtain sensitive information

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: Low
User interaction: None

What an attacker can affect

Confidentiality: Low
Integrity: Low
Availability: Low

Exploit likelihood

0.24%Up 0.2 points since Apr 1, 2026

What each source reports

CVE List Score used 5.3

Insufficient permission validation on multiple REST API Quick Setup endpoints

Record: CVE-2026-24096
CVSS 4.0: 5.3 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N
Weakness: CWE-280
Updated: 2026-11-02

EUVDEUVD-2026-17867 5.3

Record: EUVD-2026-17867
CVSS 4.0: 5.3 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N
Updated: 2026-11-02

GitHub AdvisoriesGHSA-4fwv-vp29-wx8m 5.3

Insufficient permission validation on multiple REST API Quick Setup endpoints in Checkmk 2.5.0 ...

Record: GHSA-4fwv-vp29-wx8m
CVSS 4.0: 5.3 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1: 8.8 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-280
Updated: 2026-11-02

NVD 5.3

Record: CVE-2026-24096
CVSS 4.0: 5.3 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1: 8.8 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-280
Updated: 2026-11-02

OSV 5.3

Insufficient permission validation on multiple REST API Quick Setup endpoints

Record: CVE-2026-24096
CVSS 4.0: 5.3 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N
Weakness: CWE-280
Updated: 2026-11-02

OSVUBUNTU-CVE-2026-24096 5.3

Record: UBUNTU-CVE-2026-24096
CVSS 4.0: 5.3 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N
CVSS 3.1: 8.8 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

Affected products

Affected packages

Affected packages
Package	Affected	Fixed
`check-mk` Ubuntu:Pro:16.04:LTS	All versions, plus listed versions 1.2.6p5-11.2.6p12-11.2.6p12-1ubuntu0.16.04.11.2.6p12-1ubuntu0.16.04.1+esm1	None known
`check-mk` Ubuntu:18.04:LTS	All versions, plus listed versions 1.2.8p16-1ubuntu0.11.2.8p16-1ubuntu0.2	None known

History

History
Recorded	Changed	Sources
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-24096 is a medium vulnerability (CVSS 5.3) in Checkmk, published April 1, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.24%, the 15th percentile. No source names a fixed version.