High severity · published Aug 12, 2026
CVE-2026-72801
SiYuan before v3.7.4 Information Disclosure via Encryption Key Material
7.5
CVSS
0.3%
EPSS
No
On KEV
Description
SiYuan versions before v3.7.4 disclose encrypted-notebook key-derivation material and wrapped data keys through unauthenticated endpoints in publish mode. Attackers can retrieve Argon2id salt, cost parameters, password verifiers, and wrapped notebook keys to perform unlimited offline master-password cracking without rate limiting.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 23% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SI
siyuan · siyuan-note
before 3.7.4 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-72801
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-72801
github.com
https://github.com/siyuan-note/siyuan/security/advisories/GHSA-8x84-r2ff-h8pq
www.vulncheck.com
https://www.vulncheck.com/advisories/siyuan-before-information-disclosure-via-encryption-key-material
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