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6.1
Apache NiFi may run unwanted code due to JavaScript handling
published 4 days ago
Summary
The Apache NiFi software can incorrectly process certain JavaScript text, allowing unexpected code to be executed. This could let an attacker run commands or access data inside your NiFi flows. Update NiFi to the latest release that fixes the JavaScript escaping issue.
What to do
- Update cleanstart apache-nifi to version 2.9.0-r3.
- Update cleanstart apache-nifi to version 2.9.0-r6.
Affected software
| Ecosystem | Vendor | Product | Affected versions |
|---|---|---|---|
| CleanStart | cleanstart | apache-nifi |
< 2.9.0-r3 < 2.9.0-r6 Fix: upgrade to 2.9.0-r3
|
Original advisory text
Due to incorrect escaping, the use of JavaScriptUtils
Security vulnerability affects the apache-nifi package. Due to incorrect escaping, the use of JavaScriptUtils.
Internet-facing
60 days
Internal
At next upgrade
- Not known to be exploited
- Needs hands-on effort to exploit (estimated)
- Gives an attacker partial control (estimated)
Timeline
Published31 Oct 2026
Updated31 Oct 2026
First seen31 Oct 2026
Sources
CLEANSTART-2026-BP27907 · OSV
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