CVE-2026-35490 (GCVE-0-2026-35490)

Vulnerability from cvelistv5 – Published: 2026-04-07 14:55 – Updated: 2026-04-09 14:37
VLAI
Title
changedetection.io has an Authentication Bypass via Decorator Ordering
Summary
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.
Severity
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE
  • CWE-863 - Incorrect Authorization
Assigner
References
Impacted products
Show details on NVD website
To clipboard 

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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
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