CVE-2026-35490: critical vulnerability in dgtlmoon changedetection.io
changedetection.io has an Authentication Bypass via Decorator Ordering
Published · Updated
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28Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 9.8epss 0.5%
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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected products
dgtlmoon · changedetection.ioRelated CVEs — dgtlmoon changedetection.io
In the same product, most dangerous first.
CVE-2024-32651CRITICALServer Side Template Injection in Jinja2 allows Remote Command ExecutionEPSS 85.3%CVE-2024-51483MEDIUMchangedetection.io Path Traversal vulnerabilityEPSS 2.3%CVE-2024-34061MEDIUMReflected cross site scripting in changedetection.ioEPSS 1.3%CVE-2026-25527MEDIUMchangedetection.io vulnerable to unauthenticated static path traversalEPSS 1.0%CVE-2024-56509HIGHchangedetection.io has Improper Input Validation Leading to LFR/Path TraversalEPSS 0.7%CVE-2024-51998HIGHPath traversal using file URI scheme without supplying hostname in changedetection.ioEPSS 0.7%