siyuan versions before v3.8.2 contain an authenticated SQL injection vulnerability in the fullTextSearchBlock endpoint's method=1 query parameter. Attackers can inject UNION SELECT statements to read the entire blocks table, bypassing publish-access controls and exposing all document content and sensitive attributes.
{
"cna_assigner": "VulnCheck",
"cwe_ids": [
"CWE-89"
],
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/87xxx/CVE-2026-87807.json"
}{
"extracted_events": [
{
"introduced": "0"
},
{
"fixed": "3.8.2"
},
{
"fixed": "v3.8.2"
}
],
"source": [
"AFFECTED_FIELD",
"DESCRIPTION"
]
}