CVE-2026-103871

A flaw was found in pulp-python's PyPI simple index. Project names are written into the HTML index without escaping. A user who can publish a Python package can store markup in the package name. A person who opens that index in a browser runs the markup in the origin that served the page, and the attacker or user can take limited actions as that person on that site during the visit. The flaw does not run commands on the server.