How serious is CVE-2026-3103?

This vulnerability has a CVSS score of 5.3 out of 10, classified as MEDIUM severity. Proof-of-concept exploit code is publicly available, making this an active threat.

Is there exploit code available for CVE-2026-3103?

Yes, proof-of-concept exploit code for CVE-2026-3103 is publicly available on GitHub and security research platforms. This increases the risk of active exploitation.

Which products are affected by CVE-2026-3103?

CVE-2026-3103 affects checkmk checkmk. Check the full CVE details for specific version information.

How do I fix CVE-2026-3103?

To remediate CVE-2026-3103, check for security patches from checkmk. Apply all available updates and security patches. If no patch is available, implement recommended workarounds or security controls to mitigate the risk.

CVE-2026-3103

Medium

|5.3

Exploit Available

Plain English Summary

AI-powered analysis for quick understanding

A low-privileged user can exploit a flaw in Checkmk to unintentionally delete important data. This issue affects specific older versions of the software, so users running those versions should update to avoid potential data loss.

Technical Description

A logic error in the remove_password() function in Checkmk GmbH's Checkmk versions <2.4.0p23, <2.3.0p43, and 2.2.0 (EOL) allows a low-privileged user to cause data loss.

CVSS Vector Analysis

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

Confidentiality ImpactHigh

Integrity ImpactHigh

Availability ImpactHigh

ScopeChanged

Vector String

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/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

Exploit Resources

Search for proof-of-concept code and exploit modules

GitHub Search Exploit-DB Nuclei Templates Metasploit Vulners

Official References

NIST NVD

Est. Bounty

$724($500-$1K)

Vendor Response

Grade APatched in 1 day

Quick Information

Published

Mar 4, 2026

about 1 month ago

Last Modified

Mar 5, 2026

about 1 month ago

Vendor

checkmk

Product

checkmk

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