jmpsec osctrl up to 0.4.x Query Parameter cross site scripting

Summaryinfo

A vulnerability labeled as problematic has been found in jmpsec osctrl up to 0.4.x. This impacts an unknown function of the component Query Parameter Handler. Executing a manipulation can lead to cross site scripting. This vulnerability appears as CVE-2026-28280. The attack may be performed from remote. There is no available exploit. The affected component should be upgraded.

Detailsinfo

A vulnerability classified as problematic was found in jmpsec osctrl up to 0.4.x. This vulnerability affects an unknown part of the component Query Parameter Handler. The manipulation with an unknown input leads to a cross site scripting vulnerability. The CWE definition for the vulnerability is CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. As an impact it is known to affect integrity. CVE summarizes:

osctrl is an osquery management solution. Prior to version 0.5.0, a stored cross-site scripting (XSS) vulnerability exists in the `osctrl-admin` on-demand query list. A user with query-level permissions can inject arbitrary JavaScript via the query parameter when running an on-demand query. The payload is stored and executes in the browser of any user (including administrators) who visits the query list page. This can be chained with CSRF token extraction to escalate privileges and take actions as the logged in user. An attacker with query-level permissions (the lowest privilege tier) can execute arbitrary JavaScript in the browsers of all users who view the query list. Depending on their level of access, it can lead to full platform compromise if an administrator executes the payload. The issue is fixed in osctrl `v0.5.0`. As a workaround, restrict query-level permissions to trusted users, monitor query list for suspicious payloads, and/or review osctrl user accounts for unauthorized administrators.

The advisory is shared for download at github.com. This vulnerability was named CVE-2026-28280 since 02/26/2026. The exploitation appears to be easy. The attack can be initiated remotely. Additional levels of successful authentication are necessary for exploitation. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1059.007.

Upgrading to version 0.5.0 eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-8923). Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

• jmpsec

Name

• osctrl

Version

• 0.1
• 0.2
• 0.3
• 0.4

Website

• Product: https://github.com/jmpsec/osctrl/

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Once again VulDB remains the best source for vulnerability data.

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