121 lines
5.1 KiB
JSON
121 lines
5.1 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-40107",
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"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
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"state": "PUBLISHED",
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"assignerShortName": "GitHub_M",
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"dateReserved": "2026-04-09T01:41:38.536Z",
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"datePublished": "2026-04-09T21:03:58.572Z",
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"dateUpdated": "2026-04-10T18:12:28.538Z"
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},
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"containers": {
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"cna": {
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"title": "SiYuan Affected by Zero-Click NTLM Hash Theft and Blind SSRF via Mermaid Diagram Rendering",
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"problemTypes": [
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{
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"descriptions": [
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{
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"cweId": "CWE-918",
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"lang": "en",
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"description": "CWE-918: Server-Side Request Forgery (SSRF)",
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"type": "CWE"
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}
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]
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}
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],
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"metrics": [
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{
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"cvssV4_0": {
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"attackVector": "NETWORK",
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"attackComplexity": "LOW",
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"attackRequirements": "NONE",
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"privilegesRequired": "NONE",
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"userInteraction": "NONE",
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"vulnConfidentialityImpact": "HIGH",
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"vulnIntegrityImpact": "NONE",
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"vulnAvailabilityImpact": "NONE",
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"subConfidentialityImpact": "LOW",
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"subIntegrityImpact": "LOW",
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"subAvailabilityImpact": "NONE",
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"baseScore": 8.7,
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"baseSeverity": "HIGH",
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"vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:L/SI:L/SA:N",
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"version": "4.0"
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}
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}
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],
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"references": [
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{
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"name": "https://github.com/siyuan-note/siyuan/security/advisories/GHSA-w95v-4h65-j455",
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"tags": [
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"x_refsource_CONFIRM"
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],
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"url": "https://github.com/siyuan-note/siyuan/security/advisories/GHSA-w95v-4h65-j455"
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}
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],
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"affected": [
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{
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"vendor": "siyuan-note",
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"product": "siyuan",
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"versions": [
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{
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"version": "< 3.6.4",
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"status": "affected"
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}
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]
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}
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],
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"providerMetadata": {
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"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
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"shortName": "GitHub_M",
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"dateUpdated": "2026-04-09T21:03:58.572Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "SiYuan is a personal knowledge management system. Prior to 3.6.4, SiYuan configures Mermaid.js with securityLevel: \"loose\" and htmlLabels: true. In this mode, <img> tags with src attributes survive Mermaid's internal DOMPurify and land in SVG <foreignObject> blocks. The SVG is injected via innerHTML with no secondary sanitization. When a victim opens a note containing a malicious Mermaid diagram, the Electron client fetches the URL. On Windows, a protocol-relative URL (//attacker.com/image.png) resolves as a UNC path (\\\\attacker.com\\image.png). Windows attempts SMB authentication automatically, sending the victim's NTLMv2 hash to the attacker. This vulnerability is fixed in 3.6.4."
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}
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],
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"source": {
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"advisory": "GHSA-w95v-4h65-j455",
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"discovery": "UNKNOWN"
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}
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},
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"adp": [
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{
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"metrics": [
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{
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"other": {
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"type": "ssvc",
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"content": {
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"timestamp": "2026-04-10T18:12:18.595543Z",
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"id": "CVE-2026-40107",
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"options": [
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{
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"Exploitation": "poc"
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},
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{
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"Automatable": "no"
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},
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{
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"Technical Impact": "partial"
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}
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],
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"role": "CISA Coordinator",
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"version": "2.0.3"
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}
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}
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}
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],
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"title": "CISA ADP Vulnrichment",
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"providerMetadata": {
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"shortName": "CISA-ADP",
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"dateUpdated": "2026-04-10T18:12:28.538Z"
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}
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}
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]
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}
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} |