SiYuan versions before v3.8.1 contain a server-side request forgery vulnerability in the http_request and web_fetch agent tools that perform DNS resolution only at guard time without validating the connect-time resolution. Attackers can use DNS rebinding to answer the guard resolution with a public IP and the connect resolution with a private or metadata IP, bypassing the SSRF defense to access cloud instance metadata and internal services.
{
"cna_assigner": "VulnCheck",
"cwe_ids": [
"CWE-918"
],
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/82xxx/CVE-2026-82234.json"
}{
"extracted_events": [
{
"introduced": "0"
},
{
"fixed": "3.8.1"
},
{
"fixed": "v3.8.1"
}
],
"source": [
"AFFECTED_FIELD",
"DESCRIPTION"
]
}