OpenProject is open-source, web-based project management software. Prior to 17.6.0, GET /api/v3/custom_options/:id resolved CustomOption records by global numeric id and allowed UserCustomField and GroupCustomField options without checking visible(current_user), so authenticated non-admin users could enumerate sequential custom option ids and read labels belonging to admin_only user or group custom fields. This issue is fixed in 17.6.0.
{
"cna_assigner": "GitHub_M",
"cwe_ids": [
"CWE-863"
],
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/67xxx/CVE-2026-67528.json"
}{
"extracted_events": [
{
"range": [
{
"introduced": "0"
},
{
"fixed": "17.6.0"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StringRangeExpression"
},
{
"range": [
{
"fixed": "a13fa079bc8040449570384c19f2d98f637179f1"
}
],
"source": "REFERENCES_COMMIT"
},
{
"original_tag": "v17.6.0",
"range": [
{
"fixed": "2ba1fce1196268ce5686ae308eceee744237440c"
}
],
"source": "REFERENCES_TAG"
}
]
}