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CVE-2026-30926

SiYuan is a personal knowledge management system. Prior to 3.5.10, a privilege escalation vulnerability exists in the publish service of SiYuan Note that allows low-privilege publish accounts (RoleReader) to modify notebook content via the /api/block/appendHeadingChildren API endpoint. The endpoint requires only the model.CheckAuth role, which accepts RoleReader sessions, but it does not enforce stricter checks, such as CheckAdminRole or CheckReadonly. This allows remote authenticated publish us
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:457f22ed611b01129e906ed3192eece2f0bf0ded1207b204758106b555d66ba3
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 2 assertions

{"cweId":"CWE-284","description":"CWE-284: Improper Access Control","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:1a8252d42bb41b1d230dbc04483261f5966d42c37780263a8996df3a03681039 · sha256:b0885ba4dbcc6816… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-862","description":"CWE-862: Missing Authorization","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:1a8252d42bb41b1d230dbc04483261f5966d42c37780263a8996df3a03681039 · sha256:b0885ba4dbcc6816… · /containers/cna/problemTypes/1/descriptions/0

Affected products and versions

1 source assertion
{"product":"siyuan","vendor":"siyuan-note","versions":[{"status":"affected","version":"< 3.5.10"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:1a8252d42bb41b1d230dbc04483261f5966d42c37780263a8996df3a03681039 · sha256:b0885ba4dbcc6816… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":7.1,"baseSeverity":"HIGH","confidentialityImpact":"LOW","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:1a8252d42bb41b1d230dbc04483261f5966d42c37780263a8996df3a03681039 · sha256:b0885ba4dbcc6816… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

2 source assertions
{"cweId":"CWE-284","description":"CWE-284: Improper Access Control","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:1a8252d42bb41b1d230dbc04483261f5966d42c37780263a8996df3a03681039 · sha256:b0885ba4dbcc6816… · /containers/cna/problemTypes/0/descriptions/0
{"cweId":"CWE-862","description":"CWE-862: Missing Authorization","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:1a8252d42bb41b1d230dbc04483261f5966d42c37780263a8996df3a03681039 · sha256:b0885ba4dbcc6816… · /containers/cna/problemTypes/1/descriptions/0

Source references

2 source assertions
{"tags":["exploit"],"url":"https://github.com/siyuan-note/siyuan/security/advisories/GHSA-f9cq-v43p-v523"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:1a8252d42bb41b1d230dbc04483261f5966d42c37780263a8996df3a03681039 · sha256:b0885ba4dbcc6816… · /containers/adp/0/references/0
{"name":"https://github.com/siyuan-note/siyuan/security/advisories/GHSA-f9cq-v43p-v523","tags":["x_refsource_CONFIRM"],"url":"https://github.com/siyuan-note/siyuan/security/advisories/GHSA-f9cq-v43p-v523"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:1a8252d42bb41b1d230dbc04483261f5966d42c37780263a8996df3a03681039 · sha256:b0885ba4dbcc6816… · /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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