CVE-2026-109309

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

• ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
• AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
• Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.38% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 31.8% of scored records. A rank, not a probability.

NVD base score

6.9 (CVSS v4.0), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

NVD analysis status

Deferred. NVD last modified this record on 2026-10-13.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2026-10-12 16:05Z16 DAYS AGO

Last updated

2026-10-13 16:54Z15 DAYS AGO

Reserved

2026-10-12

Assigning CNA

VulnCheck

Record state

PUBLISHED

Severity

Medium (CVSS 6.9)

CNA CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

Weaknesses

• CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')Base

Data version

5.2

Document digest

5ce841f147ec238f22593f9c0152467508c4d32a20c2ea5bac55cff3425d7208

• github.comGitHub Security Advisory (GHSA-phmw-4rgv-r4xv)https://github.com/siyuan-note/siyuan/security/advisories/GHSA-phmw-4rgv-r4xvvendor-advisory
• github.comPatch Commithttps://github.com/siyuan-note/siyuan/commit/c6494375ea40ee973f430f0e85d50f1862a30d81patch
• www.vulncheck.comVulnCheck Advisory: SiYuan v3.7.0 before v3.8.6 Arbitrary File Read via Plugin ResponseFile.Pathhttps://www.vulncheck.com/advisories/siyuan-3.7.0-before-3.8.6-arbitrary-file-read-via-plugin-responsefile-paththird-party-advisory