Windows
CVE-2026-25992
HIGH
GHSA-f72r-2h5j-7639
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Primary rating from GitHub Advisory · only source for this CVE.
CVSS VectorGitHub Advisory
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Lifecycle Timeline
3DescriptionGitHub Advisory
SiYuan is a personal knowledge management system. Prior to 3.5.5, the /api/file/getFile endpoint uses case-sensitive string equality checks to block access to sensitive files. On case-insensitive file systems such as Windows, attackers can bypass restrictions using mixed-case paths and read protected configuration files. This vulnerability is fixed in 3.5.5.
AnalysisAI
Unauthenticated attackers can read sensitive configuration files from SiYuan knowledge management systems prior to version 3.5.5 by exploiting case-sensitivity bypass in file access controls on Windows and other case-insensitive filesystems. The /api/file/getFile endpoint fails to properly validate mixed-case path traversal attempts, allowing unauthorized access to protected data. Public exploit code exists for this vulnerability, and no patch is currently available.
Technical ContextAI
Classified as CWE-22 (Path Traversal). Affects Siyuan. SiYuan is a personal knowledge management system. Prior to 3.5.5, the /api/file/getFile endpoint uses case-sensitive string equality checks to block access to sensitive files. On case-insensitive file systems such as Windows, attackers can bypass restrictions using mixed-case paths and read protected configuration files. This vulnerability is fixed in 3.5.5.
RemediationAI
Fixed in version 3.5.5.. Validate and sanitize file path inputs. Use allowlists. Restrict network access to the affected service where possible.
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External POC / Exploit Code
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