HIGH 8.4 NVD
CVE-2026-82234
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
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.
References
- https://github.com/siyuan-note/siyuan/security/advisories/GHSA-x8gv-g2g3-65fj
- https://www.vulncheck.com/advisories/siyuan-before-3.8.1-ssrf-via-dns-rebinding-toctou
This high severity vulnerability with a CVSS score of 8.4 was published on 2026-08-28 via NVD.
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