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CVE-2026-66395

SiYuan desktop before v3.7.2 contains a reflected cross-site scripting vulnerability in the bazaar plugin readme handler that allows attackers to execute arbitrary code by crafting a malicious siyuan:// deep link. Attackers can inject HTML payloads via the plugin name parameter that execute with full Node.js access through insertAdjacentHTML rendering in an insecurely configured Electron renderer.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:a0a2cb0d756288cd0c110a553759cef633782e50b850bee1fe8d5e80577e1faf
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cvss · 2 assertions

{"metric":{"attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":9.4,"baseSeverity":"CRITICAL","privilegesRequired":"NONE","subAvailabilityImpact":"HIGH","subConfidentialityImpact":"HIGH","subIntegrityImpact":"HIGH","userInteraction":"PASSIVE","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH"},"metric_type":"cvssV4_0"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:317e12bef6834307eaf007d4acabd3f6319efd6be76bb9cec0a526e66596c460 · sha256:d658cce45c343c5e… · /containers/cna/metrics/0/cvssV4_0

{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":9.6,"baseSeverity":"CRITICAL","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/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:v2:317e12bef6834307eaf007d4acabd3f6319efd6be76bb9cec0a526e66596c460 · sha256:d658cce45c343c5e… · /containers/cna/metrics/1/cvssV3_1

Affected products and versions

1 source assertion
{"defaultStatus":"unaffected","packageURL":"pkg:npm/github.com/siyuan-note/siyuan","product":"siyuan","vendor":"siyuan-note","versions":[{"lessThan":"3.7.2","status":"affected","version":"0","versionType":"semver"},{"status":"unaffected","version":"3.7.2","versionType":"semver"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:317e12bef6834307eaf007d4acabd3f6319efd6be76bb9cec0a526e66596c460 · sha256:d658cce45c343c5e… · /containers/cna/affected/0

Provider-owned CVSS observations

2 source assertions
{"metric":{"attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":9.4,"baseSeverity":"CRITICAL","privilegesRequired":"NONE","subAvailabilityImpact":"HIGH","subConfidentialityImpact":"HIGH","subIntegrityImpact":"HIGH","userInteraction":"PASSIVE","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:317e12bef6834307eaf007d4acabd3f6319efd6be76bb9cec0a526e66596c460 · sha256:d658cce45c343c5e… · /containers/cna/metrics/0/cvssV4_0
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":9.6,"baseSeverity":"CRITICAL","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/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:v2:317e12bef6834307eaf007d4acabd3f6319efd6be76bb9cec0a526e66596c460 · sha256:d658cce45c343c5e… · /containers/cna/metrics/1/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-79","description":"Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:317e12bef6834307eaf007d4acabd3f6319efd6be76bb9cec0a526e66596c460 · sha256:d658cce45c343c5e… · /containers/cna/problemTypes/0/descriptions/0

Source references

3 source assertions
{"tags":["exploit"],"url":"https://github.com/siyuan-note/siyuan/security/advisories/GHSA-6gx2-8gcr-x83f"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:317e12bef6834307eaf007d4acabd3f6319efd6be76bb9cec0a526e66596c460 · sha256:d658cce45c343c5e… · /containers/adp/0/references/0
{"name":"GitHub Security Advisory (GHSA-6gx2-8gcr-x83f)","tags":["vendor-advisory"],"url":"https://github.com/siyuan-note/siyuan/security/advisories/GHSA-6gx2-8gcr-x83f"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:317e12bef6834307eaf007d4acabd3f6319efd6be76bb9cec0a526e66596c460 · sha256:d658cce45c343c5e… · /containers/cna/references/0
{"name":"VulnCheck Advisory: SiYuan Desktop before v3.7.2 Reflected XSS to RCE via siyuan Protocol","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/siyuan-desktop-before-reflected-xss-to-rce-via-siyuan-protocol"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:317e12bef6834307eaf007d4acabd3f6319efd6be76bb9cec0a526e66596c460 · sha256:d658cce45c343c5e… · /containers/cna/references/1

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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