CVE-2026-91085: Apache Karaf config:install command authorization bypass

CVE-2026-91085 · Severity: info · Published 2026-09-29

Apache Karaf is a modular Java application container used to run enterprise services. An authentication bypass in the config:install command allows any authenticated user to upload and overwrite arbitrary configuration files, including security-critical ACL files that control which users can run which commands. Since Karaf automatically reloads configuration changes without requiring a restart, an attacker could escalate privileges or disable security controls.

Technologies: Apache Karaf. Vendors: Apache.

Quick answers

Is CVE-2026-91085 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-91085 being exploited in the wild.
How severe is CVE-2026-91085?
Informational severity, published 29 September 2026.
Which products and versions are affected?
Apache Karaf all versions with the default ACL configuration.
Is there a fix for CVE-2026-91085?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-91085 attacked?
It is attacked over the network, in a software library.
Am I affected by CVE-2026-91085?
Check whether you run Apache Karaf at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

The config:install shell command lacks an ACL rule and fails open when no matching rule is found, allowing any authenticated user to execute it. The command accepts a URL and fetches content into the Karaf etc directory with optional file override, and while path traversal is blocked, the etc directory contains all security-relevant configuration files including ACL definitions. An attacker can craft a malicious CFG file and upload it via config:install to override the ACL rules governing command authorization.

Affected products

  • Apache Karaf all versions with the default ACL configuration

Timeline

  • 2026-09-29: disclosed

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