CVE-2026-73605: Missing Authorization in siyuan-note siyuan
SiYuan note-taking software versions before v3.7.4 have a path traversal vulnerability in the getUniqueFilename endpoint. This flaw allows anonymous users to supply arbitrary absolute paths to check for the existence of files and directories on the host filesystem without proper authorization or confinement. This enables attackers to perform reconnaissance on the filesystem layout and installed software. The vulnerability has a CVSS 4.0 base score of 6.9, indicating medium severity. No official patch or remediation guidance is currently available from the vendor. There is no evidence of exploitation in the wild at this time.
AI Analysis
Technical Summary
CVE-2026-73605 describes a path traversal vulnerability in SiYuan note-taking software prior to version 3.7.4. The vulnerability exists in the getUniqueFilename endpoint, which fails to validate or confine user-supplied paths. As a result, unauthenticated attackers can probe arbitrary absolute filesystem paths to determine the existence of files and directories. This information disclosure can aid attackers in mapping the filesystem and identifying installed software components. The CVSS 4.0 vector indicates network attack vector, low complexity, no privileges required, no user interaction, low confidentiality impact, and no impact on integrity or availability.
Potential Impact
The vulnerability allows unauthenticated attackers to perform filesystem reconnaissance by verifying the existence of arbitrary files and directories. This can reveal sensitive information about the host environment and installed software, potentially aiding further targeted attacks. However, it does not directly allow modification, deletion, or execution of files, limiting the impact to information disclosure.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, restrict access to the getUniqueFilename endpoint or deploy compensating controls such as web application firewalls to detect and block path traversal attempts. Monitor for unusual requests targeting this endpoint. Avoid exposing the service to untrusted networks if possible.
CVE-2026-73605: Missing Authorization in siyuan-note siyuan
Description
SiYuan note-taking software versions before v3.7.4 have a path traversal vulnerability in the getUniqueFilename endpoint. This flaw allows anonymous users to supply arbitrary absolute paths to check for the existence of files and directories on the host filesystem without proper authorization or confinement. This enables attackers to perform reconnaissance on the filesystem layout and installed software. The vulnerability has a CVSS 4.0 base score of 6.9, indicating medium severity. No official patch or remediation guidance is currently available from the vendor. There is no evidence of exploitation in the wild at this time.
CVSS v4.0
Score 6.9medium
Affected software
pkg:github/siyuan-note/siyuanRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-73605 describes a path traversal vulnerability in SiYuan note-taking software prior to version 3.7.4. The vulnerability exists in the getUniqueFilename endpoint, which fails to validate or confine user-supplied paths. As a result, unauthenticated attackers can probe arbitrary absolute filesystem paths to determine the existence of files and directories. This information disclosure can aid attackers in mapping the filesystem and identifying installed software components. The CVSS 4.0 vector indicates network attack vector, low complexity, no privileges required, no user interaction, low confidentiality impact, and no impact on integrity or availability.
Potential Impact
The vulnerability allows unauthenticated attackers to perform filesystem reconnaissance by verifying the existence of arbitrary files and directories. This can reveal sensitive information about the host environment and installed software, potentially aiding further targeted attacks. However, it does not directly allow modification, deletion, or execution of files, limiting the impact to information disclosure.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, restrict access to the getUniqueFilename endpoint or deploy compensating controls such as web application firewalls to detect and block path traversal attempts. Monitor for unusual requests targeting this endpoint. Avoid exposing the service to untrusted networks if possible.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-08-13T11:15:12.096Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a7dbdf8bf8831d539322586
Added to database: 08/13/2026, 12:52:08 UTC
Last enriched: 08/13/2026, 12:54:33 UTC
Last updated: 08/13/2026, 13:21:09 UTC
Views: 2
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