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CVE-2026-54067

SiYuan is an open-source personal knowledge management system. Prior to 3.7.0, CSS snippet body containing </style> breaks out of its surrounding <style> tag when renderSnippet() interpolates it via insertAdjacentHTML. A payload like runs arbitrary JavaScript in the renderer. On Electron desktop builds the renderer runs with nodeIntegration:true, so require('child_process') is reachable from the injected handler and the XSS chains to host RCE. Snippets sync via the workspace repository, so an at
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:6b5e6e1a47558c03c503a425d54ce3c42fd189cef4ef6657bbdc03fee81fa3ed
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-1188","description":"CWE-1188: Insecure Default Initialization of Resource","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:d336428ae9a6f435a6783e17ffa714f6ff662a894891d38bdffbf04bbc1c567a · sha256:622e57e1aa5ee058… · /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:d336428ae9a6f435a6783e17ffa714f6ff662a894891d38bdffbf04bbc1c567a · sha256:622e57e1aa5ee058… · /containers/cna/problemTypes/0/descriptions/0

Affected products and versions

1 source assertion
{"product":"siyuan","vendor":"siyuan-note","versions":[{"status":"affected","version":"< 3.7.0"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:d336428ae9a6f435a6783e17ffa714f6ff662a894891d38bdffbf04bbc1c567a · sha256:622e57e1aa5ee058… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":9.9,"baseSeverity":"CRITICAL","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/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:d336428ae9a6f435a6783e17ffa714f6ff662a894891d38bdffbf04bbc1c567a · sha256:622e57e1aa5ee058… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

2 source assertions
{"cweId":"CWE-1188","description":"CWE-1188: Insecure Default Initialization of Resource","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:d336428ae9a6f435a6783e17ffa714f6ff662a894891d38bdffbf04bbc1c567a · sha256:622e57e1aa5ee058… · /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:d336428ae9a6f435a6783e17ffa714f6ff662a894891d38bdffbf04bbc1c567a · sha256:622e57e1aa5ee058… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions
{"tags":["exploit"],"url":"https://github.com/siyuan-note/siyuan/security/advisories/GHSA-mvjr-vv3c-w4qv"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:d336428ae9a6f435a6783e17ffa714f6ff662a894891d38bdffbf04bbc1c567a · sha256:622e57e1aa5ee058… · /containers/adp/0/references/0
{"name":"https://github.com/siyuan-note/siyuan/security/advisories/GHSA-mvjr-vv3c-w4qv","tags":["x_refsource_CONFIRM"],"url":"https://github.com/siyuan-note/siyuan/security/advisories/GHSA-mvjr-vv3c-w4qv"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:d336428ae9a6f435a6783e17ffa714f6ff662a894891d38bdffbf04bbc1c567a · sha256:622e57e1aa5ee058… · /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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