What it is about

Splunk Enterprise ermöglicht Monitoring und Analyse von Clickstream-Daten und Kundentransaktionen. Ein Angreifer kann mehrere Schwachstellen in Splunk Enterprise ausnutzen, um beliebigen Code auszuführen, Cross-Site-Scripting-Angriffe durchzuführen, Daten zu manipulieren, Sicherheitsmaßnahmen zu umgehen oder vertrauliche Informationen offenzulegen.

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

• beliebigen Code auszuführen
• Cross-Site-Scripting-Angriffe durchzuführen
• Daten zu manipulieren
• Sicherheitsmaßnahmen zu umgehen oder vertrauliche Informationen offenzulegen

Am I affected?

Affected according to the BSI:

• Splunk Splunk Enterprise <10.4.0
• Splunk Splunk Enterprise <10.2.4
• Splunk Splunk Enterprise <10.0.7
• Splunk Splunk Enterprise <9.4.12
• Splunk Splunk Enterprise <9.3.13

The installed version is usually shown under “Help → About” or in the device’s admin interface.

What helps?

Update to at least:

• Splunk Splunk Enterprise 10.4.0
• Splunk Splunk Enterprise 10.2.4
• Splunk Splunk Enterprise 10.0.7
• Splunk Splunk Enterprise 9.4.12
• Splunk Splunk Enterprise 9.3.13

Is the vulnerability already being exploited?

• CVE-2026-20253: exploited in the wild according to CISA, in the catalogue since 18.06.2026.