{"cve":"CVE-2026-35490","nvd":{"published":"2026-04-07T16:16:27.317","modified":"2026-10-26T21:10:00.170","status":"Analyzed","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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":9.8},"cwes":["CWE-863"],"references":["https://github.com/dgtlmoon/changedetection.io/security/advisories/GHSA-jmrh-xmgh-x9j4","https://github.com/dgtlmoon/changedetection.io/security/advisories/GHSA-jmrh-xmgh-x9j4"],"products":["webtechnologies:changedetection"],"source":"nvd","synced_at":"2026-10-26T21:38:48.864438205+00:00"},"epss":{"cve":"CVE-2026-35490","score":0.00536,"percentile":0.44921,"date":"2026-10-26"},"kev":null,"osv":[{"id":"GHSA-jmrh-xmgh-x9j4","url":"https://osv.dev/vulnerability/GHSA-jmrh-xmgh-x9j4","summary":"changedetection.io Vulnerable to Authentication Bypass via Decorator Ordering","modified":"2026-06-05T14:30:12.652829317Z","packages":[{"ecosystem":"PyPI","name":"changedetection-io","purl":"pkg:pypi/changedetection-io","ranges":["<0.54.8"],"fixed":["0.54.8"]}]},{"id":"PYSEC-2026-28","url":"https://osv.dev/vulnerability/PYSEC-2026-28","summary":"","modified":"2026-05-20T09:18:54.357492Z","packages":[{"ecosystem":"PyPI","name":"changedetection-io","purl":"pkg:pypi/changedetection-io","ranges":["<0.54.8"],"fixed":["0.54.8"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}