Pulpcore: python-pulpcore: stored cross-site scripting via inline rendering of uploaded html/svg content

Summary

A flaw was found in pulpcore's content serving application. Files uploaded to Pulp file-type repositories are served with their original content type (e.g., text/html for .html files, image/svg+xml for .svg files) and without a Content-Disposition: attachment header when using local filesystem storage. An authenticated user or attacker with content upload permissions can upload a specially crafted HTML or SVG file containing JavaScript, which executes in the browser of any user who visits the file URL, resulting in stored cross-site scripting (XSS) in the context of the host application.

Timeline

1. Sep 1, 2026, 3:18 PM UTCCVE published
2. Sep 1, 2026, 5:43 PM UTCCISA SSVC assessment

   Exploitation: none · Automatable: no · Technical impact: partial

3. Sep 17, 2026, 7:22 AM UTCRecord last updated

Affected versions

• ansible-automation-platform-24/hub-rhel8

  Version range not reported

• ansible-automation-platform-25/hub-rhel8

  Version range not reported

• ansible-automation-platform-26/hub-rhel9

  Version range not reported

• ansible-automation-platform-27/hub-rhel9

  Version range not reported

• python3.11-pulpcore

  Version range not reported

• python3.12-pulpcore

  Version range not reported

• python3x-pulpcore

  Version range not reported

• python-pulpcore

  Version range not reported

• python3.12-pulpcore

  Version range not reported

• python-pulpcore

  Version range not reported

• python-pulpcore

  Version range not reported

• rhui5/rhua-rhel9

  Version range not reported

• rhui5/rhua-tp-rhel9

  Version range not reported

References 2