Medium [CVE-2026-84232] Pulpcore: python-pulpcore: stored cross-site scripting via inline rendering of uploaded html/svg content
This medium-severity Red Hat Linux advisory covers CVE-2026-84232 affecting Red Hat Satellite 6.
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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.
Red Hat Product Security has assessed this issue as a Moderate severity vulnerability. The confidentiality and integrity impact is limited because the session cookie in the host application (Foreman/Satellite) is set with the HttpOnly attribute, which prevents direct session token theft via JavaScript.
The attacker's script can read visible page content and make authenticated API requests on behalf of the victim through the browser, but cannot exfiltrate the session itself or gain persistent access beyond the victim's active browser session. There is no availability impact.
``` In Red Hat Satellite, the /pulp/content/ path shares the same origin (protocol, hostname, and port) as the Satellite web UI, making the XSS effective against Satellite sessions.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.
Official advisory · high-confidence parse· fetched 2 hours ago·verify at source
Fixed versions
No fixed release is recorded yet. That does not prove no patch exists — confirm against the vendor advisory.
Official advisory · high-confidence parse· fetched 2 hours ago·verify at source
Mitigation checklist
- If immediate update is not possible, administrators can add security headers to the Apache reverse proxy configuration for the /pulp/content/ path. On Satellite, add the following to the Apache configuration (e.g., via a custom .conf file in /etc/httpd/conf.d/ or via a Puppet override): ``` <Location /pulp/content> Header set Content-Disposition "attachment" Header set X-Content-Type-Options "nosniff" Header set Content-Security-Policy "default-src 'none'; sandbox" </Location> ``` This forces all content downloads rather than inline rendering, and blocks script execution even if Content-Disposition is somehow bypassed. After applying, restart Apache: ```systemctl restart httpd``` Alternatively, restrict file upload permissions in Satellite to only trusted users who require content management capabilities.
Official advisory · high-confidence parse· fetched 2 hours ago·verify at source
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