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Vulnerability record · CVE-2026-72793 · published 12 August 2026

CVE-2026-72793: Insufficiently protected credentials vulnerability

SiYuan versions before v3.7.4 fail to mask sensitive configuration fields in the /api/system/getConf endpoint, allowing anonymous or publish-reader users to obtain the session-cookie signing key, OS username via pandoc path, and encrypted-notebook key material. Attackers can forge and tamper with session cookies to impersonate users, and on instances without access-auth codes configured, escalate to administrator privileges.

9.2 CVSS 4.0 Critical EPSS 0.41% · top 67.4% CWE-522 · Insufficiently protected credentials Deferred
9.2CVSS 4.0 base score
0.41%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
3References
26 Aug 2026Last modified by NVD

Description

SiYuan versions before v3.7.4 fail to mask sensitive configuration fields in the /api/system/getConf endpoint, allowing anonymous or publish-reader users to obtain the session-cookie signing key, OS username via pandoc path, and encrypted-notebook key material. Attackers can forge and tamper with session cookies to impersonate users, and on instances without access-auth codes configured, escalate to administrator privileges.

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

LinkTags
https://github.com/siyuan-note/siyuan/security/advisories/GHSA-h4v5-crx2-3cv4
https://www.vulncheck.com/advisories/siyuan-before-information-disclosure-via-api-system-getconf
https://github.com/siyuan-note/siyuan/security/advisories/GHSA-h4v5-crx2-3cv4

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Source: NIST National Vulnerability Database (record CVE-2026-72793), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.