CVE-2026-73047

MEDIUM 6.2

siyuan before v3.7.4 Server-Side Template Injection via attribute-view

CVSS Score

6.2

EPSS Score

0.0%

EPSS Percentile

0th

siyuan versions <= 3.7.3 (fixed in v3.7.4) contain a server-side template injection vulnerability in the attribute-view Template calculation feature (introduced in v3.7.0-beta.1). The feature's template engine uses Sprig's unmodified function map, which still exposes the env, expandenv, and getHostByName functions that were removed elsewhere for CVE-2024-55660. A local, unauthenticated attacker (the kernel binds to 127.0.0.1 by default with no per-UID access control) can inject a malicious Template calculation formula to read environment variables belonging to the account running siyuan — including from a separate, unprivileged OS account — and to perform DNS lookups from the server's network position.

CWE	CWE-200
Vendor	siyuan-note
Product	siyuan
Published	Aug 15, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Attack Vector

Local

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Affected Versions

siyuan-note / siyuan

0 < 3.7.4

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/siyuan-note/siyuan/security/advisories/GHSA-v97v-gxxg-rhmq vulncheck.com: https://www.vulncheck.com/advisories/siyuan-before-server-side-template-injection-via-attribute-view

Credits

🔍 K3y5tr0ke