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CVE-2026-40318

SiYuan is an open-source personal knowledge management system. In versions 3.6.3 and prior, the /api/av/removeUnusedAttributeView endpoint constructs a filesystem path using the user-controlled id parameter without validation or path boundary enforcement. An attacker can inject path traversal sequences such as ../ into the id value to escape the intended directory and delete arbitrary .json files on the server, including global configuration files and workspace metadata. This issue has been fixe
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:49d45c5b4f91a2865df69cfef9d7aee9eef7ed7efc85f32c967ccbe5af7927ae
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"product":"siyuan","vendor":"siyuan-note","versions":[{"status":"affected","version":"< 3.6.4"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:d496753d42f04180c521665d3751cd8331e8f8a24edbd4c7ba0099037feaaf42 · sha256:0ee858bbecb8a441… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":8.5,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"LOW","privilegesRequired":"LOW","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:d496753d42f04180c521665d3751cd8331e8f8a24edbd4c7ba0099037feaaf42 · sha256:0ee858bbecb8a441… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-24","description":"CWE-24: Path Traversal: '../filedir'","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:d496753d42f04180c521665d3751cd8331e8f8a24edbd4c7ba0099037feaaf42 · sha256:0ee858bbecb8a441… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions
{"name":"https://github.com/siyuan-note/siyuan/releases/tag/v3.6.4","tags":["x_refsource_MISC"],"url":"https://github.com/siyuan-note/siyuan/releases/tag/v3.6.4"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:d496753d42f04180c521665d3751cd8331e8f8a24edbd4c7ba0099037feaaf42 · sha256:0ee858bbecb8a441… · /containers/cna/references/1
{"name":"https://github.com/siyuan-note/siyuan/security/advisories/GHSA-vw86-c94w-v3x4","tags":["x_refsource_CONFIRM"],"url":"https://github.com/siyuan-note/siyuan/security/advisories/GHSA-vw86-c94w-v3x4"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:d496753d42f04180c521665d3751cd8331e8f8a24edbd4c7ba0099037feaaf42 · sha256:0ee858bbecb8a441… · /containers/cna/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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