High severity · published Sep 3, 2026
CVE-2026-85174
SiYuan before v3.8.2 API Token Exposure via Log File
8.8
CVSS
0.5%
EPSS
No
On KEV
Description
SiYuan before v3.8.2 logs API tokens from query parameters in plaintext to an accessible log file when full-text search requests exceed timing thresholds. Authenticated attackers can read the log file via the getFile endpoint to recover admin API tokens and gain permanent administrative access.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 43% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SI
siyuan · siyuan-note
before 3.8.2 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-85174
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-85174
github.com
https://github.com/siyuan-note/siyuan/security/advisories/GHSA-3wvc-5754-gp67
www.vulncheck.com
https://www.vulncheck.com/advisories/siyuan-before-3.8.2-api-token-exposure-via-log-file
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