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CVE-2026-40322

SiYuan is an open-source personal knowledge management system. In versions 3.6.3 and below, Mermaid diagrams are rendered with securityLevel set to "loose", and the resulting SVG is injected into the DOM via innerHTML. This allows attacker-controlled javascript: URLs in Mermaid code blocks to survive into the rendered output. On desktop builds using Electron, windows are created with nodeIntegration enabled and contextIsolation disabled, escalating the stored XSS to arbitrary code execution when
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:852bc12189f17075a23bab95f586bd1b0c54523eb59b001eb3f659ca8cb8ba1c
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-94","description":"CWE-94: Improper Control of Generation of Code ('Code Injection')","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:6bd943770db42994c33780cbf5a6b0a7ec6f7797324a47ec75811b172bbb716f · sha256:9cee6d0146c3fc42… · /containers/cna/problemTypes/1/descriptions/0

{"cweId":"CWE-79","description":"CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:6bd943770db42994c33780cbf5a6b0a7ec6f7797324a47ec75811b172bbb716f · sha256:9cee6d0146c3fc42… · /containers/cna/problemTypes/0/descriptions/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:v2:6bd943770db42994c33780cbf5a6b0a7ec6f7797324a47ec75811b172bbb716f · sha256:9cee6d0146c3fc42… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":9.1,"baseSeverity":"CRITICAL","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"CHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:6bd943770db42994c33780cbf5a6b0a7ec6f7797324a47ec75811b172bbb716f · sha256:9cee6d0146c3fc42… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

2 source assertions
{"cweId":"CWE-94","description":"CWE-94: Improper Control of Generation of Code ('Code Injection')","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:6bd943770db42994c33780cbf5a6b0a7ec6f7797324a47ec75811b172bbb716f · sha256:9cee6d0146c3fc42… · /containers/cna/problemTypes/1/descriptions/0
{"cweId":"CWE-79","description":"CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:6bd943770db42994c33780cbf5a6b0a7ec6f7797324a47ec75811b172bbb716f · sha256:9cee6d0146c3fc42… · /containers/cna/problemTypes/0/descriptions/0

Source references

3 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:v2:6bd943770db42994c33780cbf5a6b0a7ec6f7797324a47ec75811b172bbb716f · sha256:9cee6d0146c3fc42… · /containers/cna/references/1
{"name":"https://github.com/siyuan-note/siyuan/security/advisories/GHSA-x63q-3rcj-hhp5","tags":["x_refsource_CONFIRM"],"url":"https://github.com/siyuan-note/siyuan/security/advisories/GHSA-x63q-3rcj-hhp5"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:6bd943770db42994c33780cbf5a6b0a7ec6f7797324a47ec75811b172bbb716f · sha256:9cee6d0146c3fc42… · /containers/cna/references/0
{"tags":["exploit"],"url":"https://github.com/siyuan-note/siyuan/security/advisories/GHSA-x63q-3rcj-hhp5"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:6bd943770db42994c33780cbf5a6b0a7ec6f7797324a47ec75811b172bbb716f · sha256:9cee6d0146c3fc42… · /containers/adp/0/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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