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CVE-2026-33066

SiYuan is a personal knowledge management system. In versions 3.6.0 and below, the backend renderREADME function uses lute.New() without calling SetSanitize(true), allowing raw HTML embedded in Markdown to pass through unmodified. The frontend then assigns the rendered HTML to innerHTML without any additional sanitization. A malicious package author can embed arbitrary JavaScript in their README that executes when a user clicks to view the package details. Because SiYuan's Electron configuration
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:1c242ac8ef93410818a78d56d05bcbcbcd74a38a26d1ccd358ab3806439c6c32
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"product":"siyuan","vendor":"siyuan-note","versions":[{"status":"affected","version":"< 3.6.1"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:d0175e44235570de2d6202afd30ca299bdc77c827d7f476eb52a34f674661144 · sha256:f4885eaa60ddd11c… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":5.3,"baseSeverity":"MEDIUM","privilegesRequired":"LOW","subAvailabilityImpact":"NONE","subConfidentialityImpact":"LOW","subIntegrityImpact":"LOW","userInteraction":"NONE","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:d0175e44235570de2d6202afd30ca299bdc77c827d7f476eb52a34f674661144 · sha256:f4885eaa60ddd11c… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion
{"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:d0175e44235570de2d6202afd30ca299bdc77c827d7f476eb52a34f674661144 · sha256:f4885eaa60ddd11c… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions
{"name":"https://github.com/siyuan-note/siyuan/commit/b382f50e1880ed996364509de5a10a72d7409428","tags":["x_refsource_MISC"],"url":"https://github.com/siyuan-note/siyuan/commit/b382f50e1880ed996364509de5a10a72d7409428"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:d0175e44235570de2d6202afd30ca299bdc77c827d7f476eb52a34f674661144 · sha256:f4885eaa60ddd11c… · /containers/cna/references/1
{"name":"https://github.com/siyuan-note/siyuan/security/advisories/GHSA-4663-4mpg-879v","tags":["x_refsource_CONFIRM"],"url":"https://github.com/siyuan-note/siyuan/security/advisories/GHSA-4663-4mpg-879v"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:d0175e44235570de2d6202afd30ca299bdc77c827d7f476eb52a34f674661144 · sha256:f4885eaa60ddd11c… · /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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