PatchTheCVECVE-2026-91006: Apache Karaf's instance-management service (InstanceServiceImpl) builds the command line used to launch a chil
CVE-2026-91006 is a high-severity flaw (CVSS 8.8) affecting karaf. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
Apache Karaf's instance-management service (InstanceServiceImpl) builds the command line used to launch a child Karaf JVM by string concatenation, then executes it through /bin/sh (Unix) or cscript (Windows). The caller-supplied javaOpts value is spliced into that string unquoted. A javaOpts value containing shell metacharacters (;, |, `, $(...)) is interpreted by the shell instead of being passed to the JVM as an option, giving arbitrary OS comm
Why this priority
- High severity
- On your watchlist
A fixed release or distro patch exists.
Risk facts
| CVSS score | 8.8 (High) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | Low |
| User interaction | None |
| EPSS exploit chance | 1.1% (top 34%) |
| CISA exploited list | No |
| Weakness | CWE-78 |
| Published | 2026-09-28 |
| Last modified | 2026-10-08 |
Last updated 2026-10-08 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2026-91006?
karaf: upgrade to 4.4.12. Exact commands for each OS are on this page.
Is CVE-2026-91006 being exploited?
CVE-2026-91006 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2026-91006 affect?
CVE-2026-91006 affects karaf. Severity is high (CVSS 8.8). Apache Karaf's instance-management service (InstanceServiceImpl) builds the command line used to launch a child Karaf JVM by string concatenation, then executes it through /bin/sh (Unix) or cscript (Windows). The caller-supplied javaOpts va
How urgent is CVE-2026-91006?
Priority 52/100. High severity; On your watchlist
Software pages
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