cve.bz

CVE-2026-82234

8.4 highEPSS 0.4%

High (8.4). EPSS 0.4% chance of exploitation in the next 30 days. Fixed in github.com/siyuan-note/siyuan/kernel 0.0.0-20260813142806-dd2778b70d02.

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.

Severity

CVSS 4.0

8.4 high
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:L/VA:N/SC:H/SI:L/SA:N

CVSS 3.1

8.2 high
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N
EPSS
0.4% chance of exploitation in the next 30 days; higher than 30% of CVEs (scores of 2026-10-31)
CWE
CWE-918
Published
Modified
Record from
the NVD, synced

Packages (OSV)

AdvisoryEcosystemPackageAffectedFixed in
GHSA-x8gv-g2g3-65fjGogithub.com/siyuan-note/siyuan/kernel<0.0.0-20260813142806-dd2778b70d020.0.0-20260813142806-dd2778b70d02
GO-2026-6657Gogithub.com/siyuan-note/siyuan/kernel<0.0.0-20260813142806-dd2778b70d020.0.0-20260813142806-dd2778b70d02

References

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