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CVE-2026-8078

Fix stored XSS in global settings change log

MEDIUM
4.8
CVSS Score
Published: June 8, 2026 at 12:06 PM UTC
Updated: October 23, 2026 at 10:10 PM UTC
1 product affected across 1 vendorCheckmk

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Severity
MEDIUM4.8
Exploit prediction
EPSS 0.1%
SSVC
No known exploit

Description

Stored cross-site scripting in the global settings change log in Checkmk <2.5.0p5, <2.4.0p31, <2.3.0p48, and all 2.2.0 versions allows an administrator who can change global settings to store malicious HTML or JavaScript in changelog messages that executes in other users' browsers when they view the Activate Changes page or Audit log.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Checkmk· Checkmk
95%
2.2.02.2.0 b12.2.0 b22.2.0 b32.2.0 b42.2.0 b52.2.0 b62.2.0 b72.2.0 b82.2.0 i12.2.0 p12.2.0 p102.2.0 p112.2.0 p122.2.0 p132.2.0 p142.2.0 p152.2.0 p162.2.0 p172.2.0 p182.2.0 p192.2.0 p22.2.0 p202.2.0 p212.2.0 p222.2.0 p232.2.0 p242.2.0 p252.2.0 p262.2.0 p272.2.0 p282.2.0 p292.2.0 p32.2.0 p302.2.0 p312.2.0 p322.2.0 p332.2.0 p342.2.0 p352.2.0 p362.2.0 p372.2.0 p382.2.0 p392.2.0 p42.2.0 p402.2.0 p412.2.0 p422.2.0 p432.2.0 p442.2.0 p452.2.0 p462.2.0 p472.2.0 p52.2.0 p62.2.0 p72.2.0 p82.2.0 p92.3.02.3.0 b12.3.0 b22.3.0 b32.3.0 b42.3.0 b52.3.0 b62.3.0 p12.3.0 p102.3.0 p112.3.0 p122.3.0 p132.3.0 p142.3.0 p152.3.0 p162.3.0 p172.3.0 p182.3.0 p192.3.0 p22.3.0 p202.3.0 p212.3.0 p222.3.0 p232.3.0 p242.3.0 p252.3.0 p262.3.0 p272.3.0 p282.3.0 p292.3.0 p32.3.0 p302.3.0 p312.3.0 p322.3.0 p332.3.0 p342.3.0 p352.3.0 p362.3.0 p372.3.0 p382.3.0 p392.3.0 p42.3.0 p402.3.0 p412.3.0 p422.3.0 p432.3.0 p442.3.0 p452.3.0 p462.3.0 p472.3.0 p52.3.0 p62.3.0 p72.3.0 p82.3.0 p92.4.02.4.0 b12.4.0 b22.4.0 b32.4.0 b42.4.0 b52.4.0 b62.4.0 p12.4.0 p102.4.0 p112.4.0 p122.4.0 p132.4.0 p142.4.0 p152.4.0 p162.4.0 p172.4.0 p182.4.0 p192.4.0 p22.4.0 p202.4.0 p212.4.0 p222.4.0 p232.4.0 p242.4.0 p252.4.0 p262.4.0 p272.4.0 p282.4.0 p292.4.0 p32.4.0 p302.4.0 p42.4.0 p52.4.0 p62.4.0 p72.4.0 p82.4.0 p92.5.02.5.0 b12.5.0 b22.5.0 b32.5.0 p12.5.0 p22.5.0 p32.5.0 p4
Affected range stops below 2.3.0p48, so it looks safe — our inference, not a vendor statement
Affected range stops below 2.4.0p31, so it looks safe — our inference, not a vendor statement
Affected range stops below 2.5.0p5, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

Vendor Advisory
Source: cverecord
https://checkmk.com/werk/17992

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

4.8MEDIUMCheckmk
Vector?

Quick Info

StatusANALYZED
CWE
CWE-79

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