Critical severity9.8NVD Advisory· Published Apr 7, 2026· Updated Apr 14, 2026
CVE-2026-35490
CVE-2026-35490
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.
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Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
changedetection.ioPyPI | < 0.54.8 | 0.54.8 |
Affected products
2- cpe:2.3:a:webtechnologies:changedetection:*:*:*:*:*:*:*:*Range: <0.54.8
Patches
Vulnerability mechanics
References
6- github.com/dgtlmoon/changedetection.io/security/advisories/GHSA-jmrh-xmgh-x9j4nvdExploitMitigationVendor AdvisoryWEB
- github.com/advisories/GHSA-jmrh-xmgh-x9j4ghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-35490ghsaADVISORY
- github.com/dgtlmoon/changedetection.io/commit/31a760c2147e3e73a403baf6d7de34dc50429c85ghsaWEB
- github.com/dgtlmoon/changedetection.io/releases/tag/0.54.8ghsaWEB
- github.com/pypa/advisory-database/tree/main/vulns/changedetection-io/PYSEC-2026-28.yamlghsaWEB
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