changedetection.io is a free open source web page change detection tool. Prior to 0.54.8, the @loginoptionallyrequired 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.
{
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/35xxx/CVE-2026-35490.json",
"cna_assigner": "GitHub_M",
"cwe_ids": [
"CWE-863"
]
}{
"source": [
"AFFECTED_FIELD",
"CPE_RANGE"
],
"extracted_events": [
{
"introduced": "0"
},
{
"fixed": "0.54.8"
}
],
"cpe": "cpe:2.3:a:webtechnologies:changedetection:*:*:*:*:*:*:*:*"
}