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CVE-2026-66396

SiYuan before v3.7.2 fails to escape the title-img Individual Attribute List value when rendering Gallery and Kanban cover images, allowing stored cross-site scripting via unescaped style attribute interpolation. Attackers with editor permissions can inject onload handlers that execute arbitrary code in the Electron renderer with full Node.js access when victims open affected documents.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:a2f1e56ca9aef290c0ebd08b3c2bb065b14db0d8d2b7e0dd3d1d7068f06f6425
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","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":8.4,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"HIGH","scope":"CHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:H/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:a6e6717037c80d7d13adfe4a98a24e302780184ec5c25f19b03f2d487f3c8c4b · sha256:693c252b6eaaf063… · /containers/cna/metrics/1/cvssV3_1

{"metric":{"attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":9.3,"baseSeverity":"CRITICAL","privilegesRequired":"HIGH","subAvailabilityImpact":"HIGH","subConfidentialityImpact":"HIGH","subIntegrityImpact":"HIGH","userInteraction":"PASSIVE","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:H/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:a6e6717037c80d7d13adfe4a98a24e302780184ec5c25f19b03f2d487f3c8c4b · sha256:693c252b6eaaf063… · /containers/cna/metrics/0/cvssV4_0

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:a6e6717037c80d7d13adfe4a98a24e302780184ec5c25f19b03f2d487f3c8c4b · sha256:693c252b6eaaf063… · /containers/cna/affected/0

Provider-owned CVSS observations

2 source assertions
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":8.4,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"HIGH","scope":"CHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:H/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:a6e6717037c80d7d13adfe4a98a24e302780184ec5c25f19b03f2d487f3c8c4b · sha256:693c252b6eaaf063… · /containers/cna/metrics/1/cvssV3_1
{"metric":{"attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":9.3,"baseSeverity":"CRITICAL","privilegesRequired":"HIGH","subAvailabilityImpact":"HIGH","subConfidentialityImpact":"HIGH","subIntegrityImpact":"HIGH","userInteraction":"PASSIVE","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:H/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:a6e6717037c80d7d13adfe4a98a24e302780184ec5c25f19b03f2d487f3c8c4b · sha256:693c252b6eaaf063… · /containers/cna/metrics/0/cvssV4_0

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:a6e6717037c80d7d13adfe4a98a24e302780184ec5c25f19b03f2d487f3c8c4b · sha256:693c252b6eaaf063… · /containers/cna/problemTypes/0/descriptions/0

Source references

3 source assertions
{"tags":["exploit"],"url":"https://github.com/siyuan-note/siyuan/security/advisories/GHSA-5rxg-wh59-mg34"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:a6e6717037c80d7d13adfe4a98a24e302780184ec5c25f19b03f2d487f3c8c4b · sha256:693c252b6eaaf063… · /containers/adp/0/references/0
{"name":"GitHub Security Advisory (GHSA-5rxg-wh59-mg34)","tags":["vendor-advisory"],"url":"https://github.com/siyuan-note/siyuan/security/advisories/GHSA-5rxg-wh59-mg34"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:a6e6717037c80d7d13adfe4a98a24e302780184ec5c25f19b03f2d487f3c8c4b · sha256:693c252b6eaaf063… · /containers/cna/references/0
{"name":"VulnCheck Advisory: SiYuan before v3.7.2 Stored XSS to RCE via title-img IAL","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/siyuan-before-stored-xss-to-rce-via-title-img-ial"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:a6e6717037c80d7d13adfe4a98a24e302780184ec5c25f19b03f2d487f3c8c4b · sha256:693c252b6eaaf063… · /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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