CVE-2026-35490
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
- 9.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - EPSS
- 0.5% chance of exploitation in the next 30 days; higher than 44% of CVEs (scores of 2026-10-26)
- CWE
- CWE-863
- Published
- Modified
- Record from
- the NVD, synced
Affected
- webtechnologies:changedetection
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-jmrh-xmgh-x9j4 | PyPI | changedetection-io | <0.54.8 | 0.54.8 |
| PYSEC-2026-28 | PyPI | changedetection-io | <0.54.8 | 0.54.8 |