CVE-2026-40922
Description
SiYuan is an open-source personal knowledge management system. In versions 3.6.1 through 3.6.3, a prior fix for XSS in bazaar README rendering (incomplete fix for CVE-2026-33066) enabled the Lute HTML sanitizer, but the sanitizer does not block iframe tags, and its URL-prefix blocklist does not effectively filter srcdoc attributes which contain raw HTML rather than URLs. A malicious bazaar package author can include an iframe with a srcdoc attribute containing embedded scripts in their README. When other users view the package in SiYuan's marketplace UI, the payload executes in the Electron context with full application privileges, enabling arbitrary code execution on the user's machine. This issue has been fixed in version 3.6.4.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
github.com/siyuan-note/siyuan/kernelGo | < 0.0.0-20260414013942-62eed37a3263 | 0.0.0-20260414013942-62eed37a3263 |
Affected products
1- Range: < 0.0.0-20260414013942-62eed37a3263
Patches
1b382f50e1880:lock: https://github.com/siyuan-note/siyuan/security/advisories/GHSA-v3mg-9v85-fcm7
1 file changed · +1 −0
kernel/bazaar/readme.go+1 −0 modified@@ -109,6 +109,7 @@ func getInstalledPackageREADME(installPath, linkBase string, readme LocaleString func renderPackageREADME(linkBase string, mdData []byte) (ret string) { mdData = bytes.TrimPrefix(mdData, []byte("\xef\xbb\xbf")) // 移除文件开头的 BOM luteEngine := lute.New() + luteEngine.SetSanitize(true) luteEngine.SetSoftBreak2HardBreak(false) luteEngine.SetCodeSyntaxHighlight(false) luteEngine.SetLinkBase(linkBase)
Vulnerability mechanics
Generated by null/stub on May 9, 2026. Inputs: CWE entries + fix-commit diffs from this CVE's patches. Citations validated against bundle.
References
7- github.com/siyuan-note/siyuan/commit/b382f50e1880ed996364509de5a10a72d7409428nvdPatchWEB
- github.com/siyuan-note/siyuan/security/advisories/GHSA-8q5w-mmxf-48jgnvdExploitThird Party AdvisoryWEB
- github.com/advisories/GHSA-4663-4mpg-879vnvdThird Party AdvisoryADVISORY
- github.com/advisories/GHSA-8q5w-mmxf-48jgghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-33066ghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-40922ghsaADVISORY
- github.com/siyuan-note/siyuan/releases/tag/v3.6.4nvdRelease NotesWEB
News mentions
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