Checkmk: Mehrere Schwachstellen
WID-SEC-2026-3746 · first 06.10.2026 · updated 19.10.2026 · CVSS 9,6
What it is about
Checkmk ist eine IT-Monitoring-Software. Ein Angreifer kann mehrere Schwachstellen in Checkmk ausnutzen, um Cross-Site-Scripting-Angriffe durchzuführen, vertrauliche Informationen offenzulegen oder Daten zu manipulieren.
Under what conditions?
The BSI does not name any particular preconditions. Exploitable remotely according to the BSI.
What can happen in the worst case
An attacker could use the vulnerability to
- Cross-Site-Scripting-Angriffe durchzuführen
- vertrauliche Informationen offenzulegen oder Daten zu manipulieren
Am I affected?
Affected according to the BSI:
- Checkmk Checkmk <2.5.0p15
- Checkmk Checkmk <3.0.0b1
- Checkmk Checkmk <2.4.0p38
- Checkmk Checkmk <2.3.0p51
The installed version is usually shown under “Help → About” or in the device’s admin interface.
What helps?
Update to at least:
- Checkmk Checkmk 2.5.0p15
- Checkmk Checkmk 3.0.0b1
- Checkmk Checkmk 2.4.0p38
- Checkmk Checkmk 2.3.0p51
Is the vulnerability already being exploited?
None of the CVEs is in the CISA catalogue of exploited vulnerabilities. That does not mean there are no attacks, only that none are documented.
Information and sources
- Original BSI advisory (WID)
- CheckMK Werk 19372 vom 2026-10-05 checkmk.com
- CheckMK Werk 20077 vom 2026-10-05 checkmk.com
- CheckMK Werk 22314 vom 2026-10-05 checkmk.com
CVE: CVE-2026-14452, CVE-2026-92878, CVE-2026-92882
Source: BSI warning and information service (CERT-Bund); CISA. The assessment of the conditions is my reading of the BSI text; the external pages are in their original language.