Skip to content
CVE PROGRAM SOURCE RECORD9.8 Critical

CVE-2026-35490

changedetection.io has an Authentication Bypass via Decorator Ordering

Description

changedetection.io is a free open source web page change detection tool. Prior to 0.54.8, the @login_optionally_required decorator is placed before (outer to) @blueprint.route() instead of after it. In Flask, @route() must be the outermost decorator because it registers the function it receives. When the order is reversed, @route() registers the original undecorated function, and the auth wrapper is never in the call chain. This silently disables authentication on these routes. This vulnerability is fixed in 0.54.8.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

dgtlmoon changedetection.io

  • < 0.54.8affected

References