CVE-2026-91006: Apache Karaf · OS Command Injection
Affects Apache KarafSource CVE Database V5
Not known to be exploited · CVSS 8.8 High : upgrade to 4.4.12 soon.
Data as of 12 Nov 2026, 23:25 UTC
- EPSS
- 1.1% chance of exploitation in 30 days – higher than 66% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 4.4.12
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HExploitation evidence
Disclosed: evidence found.
CVE published 28 Sep 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 13 Nov 2026.
What to do
Upgrade Apache Karaf and org.apache.karaf/apache-karaf to 4.4.12.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| Apache Software FoundationApache Karaf | Affected
| Fixed in
|
Mavenorg.apache.karaf/apache-karafpkg:maven/org.apache.karaf/apache-karafOther threats | Affected
| Fixed in
|
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
Mitigation involves setting karaf.secured.command.compulsory.roles=admin in etc/system.properties to close fail-open gaps, restricting which principals can access instance:* commands and InstancesMBean via role assignments in etc/users.properties, and treating javaOpts input as untrusted unless from fully trusted operators. Users should apply these configuration changes to reduce risk until an official fix is available.
Description
CVE-2026-91006 is an OS command injection vulnerability in Apache Karaf's instance-management service. The vulnerability arises because the javaOpts parameter is concatenated into a shell command without proper quoting, allowing shell metacharacters to be interpreted by the OS shell. This can lead to arbitrary command execution with the privileges of the Karaf process user. The flaw is reachable via several Karaf shell commands and JMX operations related to instance management. Mitigations include restricting access to these commands and treating javaOpts as untrusted input unless from fully trusted operators.