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
SSVC
Exploitation: poc Automatable: yes Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-09 14:36 UTC
CWE
  • CWE-863 - Incorrect Authorization
Assigner
GitHub_M CNA under the mitre root
CNA scorecard C 72/100 over 7843 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
dgtlmoon changedetection.io Affected: < 0.54.8
guessed Create a notification for this product.
Show details on NVD website
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