MEDIUMCVSS v3.1 5.3Vulnerability
CVE-2026-126776
SiYuan 3.7.0 before 3.8.10 on Windows contains a path traversal vulnerability in kernel/util/webfetch.go that allows attackers to write files outside the import directory via backslash-encoded filenames. Attackers controlling a URL fetched by the MCP web_fetch or http_request tools can use %5C-encoded ..\ sequences to write chosen response bytes to directories above temp/import that are writable by the SiYuan user.
Properties
- Severity
- MEDIUM
- Nvd fetched at
- 2026-11-11T23:49:45.533241+00:00
- Cvss severity
- MEDIUM
- Cvss score
- 5.3
- Retrieved at
- 2026-11-11T23:50:18+00:00
- Score
- 5.3
- Cvss version
- 3.1
- Last source
- NVD
- Cve id
- CVE-2026-126776
- Cvss vector
- CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N
- First seen by Signal
- 2026-11-11T19:44:24+00:00
- Name
- CVE-2026-126776
- Vector
- CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N
- Published at
- 2026-11-11T19:17:38.287
- Last modified
- 2026-11-11T19:17:38.443
Related Entities (1)
HAS_WEAKNESS (1)
Related research
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