MEDIUMCVSS v3.1 6.1Vulnerability
CVE-2026-126393
SiYuan before 3.8.10 contains a server-side request forgery vulnerability in the skill-install download path because fetchBytes performs only a parse-time hostname check instead of using ssrfSafeClient. Attackers can supply a skill URL via the MCP skill install action that redirects or DNS-rebinds to loopback addresses, reaching internal services and metadata endpoints.
Properties
- Severity
- MEDIUM
- Nvd fetched at
- 2026-11-14T00:40:25.638091+00:00
- Epss score
- 0.00249
- Cvss severity
- MEDIUM
- Cvss score
- 6.1
- Retrieved at
- 2026-11-14T00:51:03+00:00
- Last source
- FIRST EPSS
- Score
- 6.1
- Cvss version
- 3.1
- Cve id
- CVE-2026-126393
- Cvss vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
- First seen by Signal
- 2026-11-13T17:31:47+00:00
- Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
- Published at
- 2026-11-13T10:17:43.207
- Last modified
- 2026-11-13T10:17:43.333
- Epss percentile
- 0.16376
Related Entities (1)
HAS_WEAKNESS (1)
Related research
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