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CVE-2026-44670

SiYuan: Stored XSS via Attribute View name to Electron renderer RCE in SiYuan

9.4 CriticalFix available

SiYuan is an open-source personal knowledge management system. Prior to 3.7.0, the kernel stores Attribute View (AV / database) names without any HTML escape, then a render template uses raw strings.ReplaceAll(tpl, "${avName}", nodeAvName) to embed the name in HTML before pushing to all clients via WebSocket. Three independent client paths (render.ts:120 → outerHTML, Title.ts:401 → innerHTML, transaction.ts:559 → innerHTML) consume the value without escaping. Because the main BrowserWindow runs nodeIntegration:true, contextIsolation:false, webSecurity:false (app/electron/main.js:407-411), HTML injection in the renderer becomes Node.js code execution. This vulnerability is fixed in 3.7.0.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
Passive

What an attacker can affect

Confidentiality
High
Integrity
High
Availability
High

Exploit likelihood

0.51%Up 0.4 points since May 15, 2026
90%50%10%1%

What each source reports

CVE List Score used 9.4

SiYuan: Stored XSS via Attribute View name to Electron renderer RCE in SiYuan

SiYuan is an open-source personal knowledge management system. Prior to 3.7.0, the kernel stores Attribute View (AV / database) names without any HTML escape, then a render template uses raw strings.ReplaceAll(tpl, "${avName}", nodeAvName) to embed the name in HTML before pushing to all clients via WebSocket. Three independent client paths (render.ts:120 → outerHTML, Title.ts:401 → innerHTML, transaction.ts:559 → innerHTML) consume the value without escaping. Because the main BrowserWindow runs nodeIntegration:true, contextIsolation:false, webSecurity:false (app/electron/main.js:407-411), HTML injection in the renderer becomes Node.js code execution. This vulnerability is fixed in 3.7.0.

Record
CVE-2026-44670
CVSS 4.0
9.4 CriticalCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
Weakness
CWE-79, CWE-94, CWE-1188
Updated
2026-11-02
EUVDEUVD-2026-30358 9.4

SiYuan is an open-source personal knowledge management system. Prior to 3.7.0, the kernel stores Attribute View (AV / database) names without any HTML escape, then a render template uses raw strings.ReplaceAll(tpl, "${avName}", nodeAvName) to embed the name in HTML before pushing to all clients via WebSocket. Three independent client paths (render.ts:120 → outerHTML, Title.ts:401 → innerHTML, transaction.ts:559 → innerHTML) consume the value without escaping. Because the main BrowserWindow runs nodeIntegration:true, contextIsolation:false, webSecurity:false (app/electron/main.js:407-411), HTML injection in the renderer becomes Node.js code execution. This vulnerability is fixed in 3.7.0.

Record
EUVD-2026-30358
CVSS 4.0
9.4 CriticalCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
Updated
2026-11-02
GitHub AdvisoriesGHSA-2h64-c999-c9r6 9.4

SiYuan Affected by Stored XSS via Attribute View Name to Electron Renderer RCE

Summary

The kernel stores Attribute View (AV / database) names without any HTML escape, then a render template uses raw strings.ReplaceAll(tpl, "${avName}", nodeAvName) to embed the name in HTML before pushing to all clients via WebSocket. Three independent client paths (render.ts:120 → outerHTML, Title.ts:401 → innerHTML, transaction.ts:559 → innerHTML) consume the value without escaping. Because the main BrowserWindow runs nodeIntegration:true, contextIsolation:false, webSecurity:false (app/electron/main.js:407-411), HTML injection in the renderer becomes Node.js code execution.

Payload is stored on disk under data/storage/av/<id>.json, replicates via every sync transport (S3 / WebDAV / cloud), survives .sy.zip export-import, and triggers for any role (Administrator / Editor / Reader / publish-service Visitor) opening a doc bound to the AV.

Details

Kernel write — no escape. kernel/model/attribute_view.go:3244-3255:

attrView.Name = strings.TrimSpace(operation.Data.(string))
attrView.Name = strings.ReplaceAll(attrView.Name, "\n", " ")
if 512 < utf8.RuneCountInString(attrView.Name) {
    attrView.Name = gulu.Str.SubStr(attrView.Name, 512)
}
err = av.SaveAttributeView(attrView)         // ← no html.EscapeString

Kernel template — raw replace. kernel/model/attribute_view.go:3242,3283-3284:

const attrAvNameTpl = `<span data-av-id="${avID}" ... class="popover__block">${avName}</span>`
// ...
tpl := strings.ReplaceAll(attrAvNameTpl, "${avID}", nodeAvID)
tpl = strings.ReplaceAll(tpl, "${avName}", nodeAvName)   // ← raw

Sink #1 — AV body header → outerHTML. app/src/protyle/render/av/render.ts:120 (returned from genTabHeaderHTML, written via outerHTML at render.ts:596):

<div contenteditable="${editable}" ... data-title="${data.name || ""}" ...>${data.name || ""}</div>
// ...
e.firstElementChild.outerHTML = `<div class="av__container">${genTabHeaderHTML(...)}...</div>`;

Same pattern in kanban/render.ts:227 and gallery/render.ts:142.

Sink #2 — Doc title attribute strip → innerHTML. app/src/protyle/header/Title.ts:396-403:

response.data.attrViews.forEach((item: { id: string, name: string }) => {
    avTitle += `<span data-av-id="${item.id}" ... class="popover__block">${item.name}</span>&nbsp;`;
});
nodeAttrHTML += `<div class="protyle-attr--av">...${avTitle}</div>`;
this.element.querySelector(".protyle-attr").innerHTML = nodeAttrHTML;

Sink #3 — WebSocket updateAttrs push → innerHTML. app/src/protyle/wysiwyg/transaction.ts:549-562,659:

const escapeHTML = Lute.EscapeHTMLStr(data.new[key]);
if (key === "bookmark") { bookmarkHTML = `...${escapeHTML}...`; }
else if (key === "name")     { nameHTML  = `...${escapeHTML}...`; }
else if (key === "alias")    { aliasHTML = `...${escapeHTML}...`; }
else if (key === "memo")     { memoHTML  = `...${escapeHTML}...`; }
else if (key === "custom-avs" && data.new["av-names"]) {
    avHTML = `<div class="protyle-attr--av">...${data.new["av-names"]}</div>`;
    //                                          ^^^^^^^^^^^^^^^^^^^^^^^^ raw, unlike the four siblings above
}
// ...
attrElement.innerHTML = nodeAttrHTML + Constants.ZWSP;

The four sibling cases use Lute.EscapeHTMLStr — proving the team knows the right pattern; only av-names was missed.

Renderer posture — RCE multiplier. app/electron/main.js:407-411:

webPreferences: {
    nodeIntegration: true, webviewTag: true,
    webSecurity: false, contextIsolation: false,
}

Reachability. Route /api/transactions setAttrViewName requires CheckAuth + CheckAdminRole + CheckReadonly. On default install (Conf.AccessAuthCode == ""), kernel/model/session.go:261-287 auto-grants Administrator to local-origin requests. The Origin check accepts localhost / loopback only but chrome-extension:// is explicitly allowlisted (session.go:277), so any installed browser extension calls the…

Record
GHSA-2h64-c999-c9r6
CVSS 4.0
9.4 CriticalCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
Weakness
CWE-79, CWE-94, CWE-1188
Updated
2026-11-02
NVD 9.4

SiYuan is an open-source personal knowledge management system. Prior to 3.7.0, the kernel stores Attribute View (AV / database) names without any HTML escape, then a render template uses raw strings.ReplaceAll(tpl, "${avName}", nodeAvName) to embed the name in HTML before pushing to all clients via WebSocket. Three independent client paths (render.ts:120 → outerHTML, Title.ts:401 → innerHTML, transaction.ts:559 → innerHTML) consume the value without escaping. Because the main BrowserWindow runs nodeIntegration:true, contextIsolation:false, webSecurity:false (app/electron/main.js:407-411), HTML injection in the renderer becomes Node.js code execution. This vulnerability is fixed in 3.7.0.

Record
CVE-2026-44670
CVSS 4.0
9.4 CriticalCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Weakness
CWE-79, CWE-94, CWE-1188
Updated
2026-11-02
OSV 9.4

SiYuan: Stored XSS via Attribute View name to Electron renderer RCE in SiYuan

SiYuan is an open-source personal knowledge management system. Prior to 3.7.0, the kernel stores Attribute View (AV / database) names without any HTML escape, then a render template uses raw strings.ReplaceAll(tpl, "${avName}", nodeAvName) to embed the name in HTML before pushing to all clients via WebSocket. Three independent client paths (render.ts:120 → outerHTML, Title.ts:401 → innerHTML, transaction.ts:559 → innerHTML) consume the value without escaping. Because the main BrowserWindow runs nodeIntegration:true, contextIsolation:false, webSecurity:false (app/electron/main.js:407-411), HTML injection in the renderer becomes Node.js code execution. This vulnerability is fixed in 3.7.0.

Record
CVE-2026-44670
CVSS 4.0
9.4 CriticalCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
Weakness
CWE-1188, CWE-79, CWE-94
Updated
2026-11-02
OSVGHSA-2h64-c999-c9r6 9.4

SiYuan Affected by Stored XSS via Attribute View Name to Electron Renderer RCE

Summary

The kernel stores Attribute View (AV / database) names without any HTML escape, then a render template uses raw strings.ReplaceAll(tpl, "${avName}", nodeAvName) to embed the name in HTML before pushing to all clients via WebSocket. Three independent client paths (render.ts:120 → outerHTML, Title.ts:401 → innerHTML, transaction.ts:559 → innerHTML) consume the value without escaping. Because the main BrowserWindow runs nodeIntegration:true, contextIsolation:false, webSecurity:false (app/electron/main.js:407-411), HTML injection in the renderer becomes Node.js code execution.

Payload is stored on disk under data/storage/av/<id>.json, replicates via every sync transport (S3 / WebDAV / cloud), survives .sy.zip export-import, and triggers for any role (Administrator / Editor / Reader / publish-service Visitor) opening a doc bound to the AV.

Details

Kernel write — no escape. kernel/model/attribute_view.go:3244-3255:

attrView.Name = strings.TrimSpace(operation.Data.(string))
attrView.Name = strings.ReplaceAll(attrView.Name, "\n", " ")
if 512 < utf8.RuneCountInString(attrView.Name) {
    attrView.Name = gulu.Str.SubStr(attrView.Name, 512)
}
err = av.SaveAttributeView(attrView)         // ← no html.EscapeString

Kernel template — raw replace. kernel/model/attribute_view.go:3242,3283-3284:

const attrAvNameTpl = `<span data-av-id="${avID}" ... class="popover__block">${avName}</span>`
// ...
tpl := strings.ReplaceAll(attrAvNameTpl, "${avID}", nodeAvID)
tpl = strings.ReplaceAll(tpl, "${avName}", nodeAvName)   // ← raw

Sink #1 — AV body header → outerHTML. app/src/protyle/render/av/render.ts:120 (returned from genTabHeaderHTML, written via outerHTML at render.ts:596):

<div contenteditable="${editable}" ... data-title="${data.name || ""}" ...>${data.name || ""}</div>
// ...
e.firstElementChild.outerHTML = `<div class="av__container">${genTabHeaderHTML(...)}...</div>`;

Same pattern in kanban/render.ts:227 and gallery/render.ts:142.

Sink #2 — Doc title attribute strip → innerHTML. app/src/protyle/header/Title.ts:396-403:

response.data.attrViews.forEach((item: { id: string, name: string }) => {
    avTitle += `<span data-av-id="${item.id}" ... class="popover__block">${item.name}</span>&nbsp;`;
});
nodeAttrHTML += `<div class="protyle-attr--av">...${avTitle}</div>`;
this.element.querySelector(".protyle-attr").innerHTML = nodeAttrHTML;

Sink #3 — WebSocket updateAttrs push → innerHTML. app/src/protyle/wysiwyg/transaction.ts:549-562,659:

const escapeHTML = Lute.EscapeHTMLStr(data.new[key]);
if (key === "bookmark") { bookmarkHTML = `...${escapeHTML}...`; }
else if (key === "name")     { nameHTML  = `...${escapeHTML}...`; }
else if (key === "alias")    { aliasHTML = `...${escapeHTML}...`; }
else if (key === "memo")     { memoHTML  = `...${escapeHTML}...`; }
else if (key === "custom-avs" && data.new["av-names"]) {
    avHTML = `<div class="protyle-attr--av">...${data.new["av-names"]}</div>`;
    //                                          ^^^^^^^^^^^^^^^^^^^^^^^^ raw, unlike the four siblings above
}
// ...
attrElement.innerHTML = nodeAttrHTML + Constants.ZWSP;

The four sibling cases use Lute.EscapeHTMLStr — proving the team knows the right pattern; only av-names was missed.

Renderer posture — RCE multiplier. app/electron/main.js:407-411:

webPreferences: {
    nodeIntegration: true, webviewTag: true,
    webSecurity: false, contextIsolation: false,
}

Reachability. Route /api/transactions setAttrViewName requires CheckAuth + CheckAdminRole + CheckReadonly. On default install (Conf.AccessAuthCode == ""), kernel/model/session.go:261-287 auto-grants Administrator to local-origin requests. The Origin check accepts localhost / loopback only but chrome-extension:// is explicitly allowlisted (session.go:277), so any installed browser extension calls the…

Record
GHSA-2h64-c999-c9r6
CVSS 4.0
9.4 CriticalCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
Weakness
CWE-1188, CWE-79, CWE-94
Updated
2026-11-02
OSVGO-2026-4992 No score

SiYuan Affected by Stored XSS via Attribute View Name to Electron Renderer RCE in github.com/siyuan-note/siyuan/kernel

SiYuan Affected by Stored XSS via Attribute View Name to Electron Renderer RCE in github.com/siyuan-note/siyuan/kernel

Record
GO-2026-4992
Updated
2026-11-02
OSVopenSUSE-SU-2026:21483-1 No score

Security update for govulncheck-vulndb

This update for govulncheck-vulndb fixes the following issues:

  • Update to version 0.0.20260723T184607 2026-07-23T18:46:07Z (jsc#PED-11136).

Go CVE Numbering Authority IDs added or updated with aliases:

  • GO-2026-4730 CVE-2026-33022 GHSA-cv4x-93xx-wgfj
  • GO-2026-4761 CVE-2026-33211 GHSA-j5q5-j9gm-2w5c
  • GO-2026-5102 CVE-2026-45021 GHSA-3vcp-chfh-f6r2
  • GO-2026-5272 CVE-2026-40938 GHSA-94jr-7pqp-xhcq
  • GO-2026-5486 CVE-2026-40924 GHSA-m2cx-gpqf-qf74
  • GO-2026-5542 CVE-2026-40090 GHSA-pj97-4p9w-gx3q
  • GO-2026-5630 CVE-2026-25542 GHSA-rmx9-2pp3-xhcr
  • GO-2026-5643 CVE-2026-40923 GHSA-rx35-6rhx-7858
  • GO-2026-5675 CVE-2026-41492 GHSA-vvf7-6rmr-m29q
  • GO-2026-5711 CVE-2026-40161 GHSA-wjxp-xrpv-xpff
  • GO-2026-5746 CVE-2026-41567 GHSA-x86f-5xw2-fm2r
  • GO-2026-5749 CVE-2026-41328 GHSA-x92x-px7w-4gx4
  • GO-2026-5837 CVE-2026-44840 GHSA-q2m9-6jp9-c6mc
  • GO-2026-5929 CVE-2026-44342 GHSA-26v7-h57m-gh9m
  • GO-2026-5930 CVE-2026-33655 GHSA-6qcr-qxgr-m7fv
  • GO-2026-5933 GHSA-3g4q-2f67-2gvh
  • GO-2026-5934 GHSA-59qp-cfj3-rp64
  • GO-2026-5935 GHSA-7856-g3gv-9wq8
  • GO-2026-5936 CVE-2026-53552 GHSA-26rh-24rg-j3vv
  • GO-2026-5937 CVE-2026-53508 GHSA-2jcc-mxv7-p3f9
  • GO-2026-5938 CVE-2026-53553 GHSA-4g5x-hcwm-82jw
  • GO-2026-5939 CVE-2026-10517 GHSA-698x-9w2p-7vvp
  • GO-2026-5940 CVE-2026-53572 GHSA-6w3m-4hhp-775q
  • GO-2026-5941 CVE-2026-53487 GHSA-gvhc-wv3v-7pf8
  • GO-2026-5942 CVE-2026-46600
  • GO-2026-5944 CVE-2026-50197 GHSA-659f-rgp5-w4wf
  • GO-2026-5945 CVE-2026-6815 GHSA-rmxx-v9rj-vpvg
  • GO-2026-5946 CVE-2026-52831 GHSA-v5px-423j-pf7p
  • GO-2026-5947 CVE-2026-53649 GHSA-xqhv-chqm-fhcc
  • GO-2026-5948 CVE-2026-50554 GHSA-588f-fvcv-xhvf
  • GO-2026-5949 CVE-2026-50553 GHSA-rqrh-8wpv-x7hh
  • GO-2026-5950 CVE-2026-53602 GHSA-339v-266x-79xr
  • GO-2026-5951 CVE-2026-10219 GHSA-6jm8-4fhr-5w64
  • GO-2026-5952 CVE-2026-49834 GHSA-9vcr-p3rj-q5q6
  • GO-2026-5953 CVE-2026-9094 GHSA-c9w5-qp6m-m395
  • GO-2026-5956 CVE-2026-55252 GHSA-h5g6-xmh4-hc37
  • GO-2026-5957 CVE-2026-54158 GHSA-5xfx-xj4h-5p7r
  • GO-2026-5958 CVE-2026-54068 GHSA-gcm7-57gf-953c
  • GO-2026-5959 CVE-2026-54072 GHSA-h29v-hj44-q8cv
  • GO-2026-5961 CVE-2026-54069 GHSA-hvr9-72v2-fff3
  • GO-2026-5962 CVE-2026-54088 GHSA-m93h-4hw7-5qcm
  • GO-2026-5963 CVE-2026-54067 GHSA-mvjr-vv3c-w4qv
  • GO-2026-5964 CVE-2026-54066 GHSA-p4m3-mgmm-c664
  • GO-2026-5965 CVE-2026-54070 GHSA-w7cg-whh7-xp28
  • GO-2026-5966 CVE-2026-54089 GHSA-xqp3-jq6g-x3qm
  • GO-2026-5967 CVE-2026-50551 GHSA-56mp-4f3v-fgj2
  • GO-2026-5968 CVE-2026-54174 GHSA-fpg8-7664-jc5q
  • GO-2026-5969 GHSA-g936-7jqj-mwv8
  • GO-2026-5970 CVE-2026-56852
  • GO-2026-5973 CVE-2026-54250 GHSA-jxr7-mqhw-9p98
  • GO-2026-5974 CVE-2026-44300 GHSA-wmj8-9953-vff5
  • GO-2026-5975 CVE-2026-50018 GHSA-42j2-w334-qxw7
  • GO-2026-5976 CVE-2026-50141 GHSA-g7mm-9vx7-jm7h
  • GO-2026-5977 CVE-2026-50013 GHSA-qrh4-p6v4-mrfg
  • GO-2026-5978 CVE-2026-50125 GHSA-qw5r-ppcg-f8rj
  • GO-2026-5979 CVE-2026-50006 GHSA-xrcf-6jh3-ggvx
  • GO-2026-5980 CVE-2026-50158 GHSA-2c7f-fxww-6w6c
  • GO-2026-5981 GHSA-mqxv-9rm6-w8qc
  • GO-2026-5982 GHSA-pqg7-v6wh-3pfp
  • GO-2026-5984 CVE-2026-53604 GHSA-2p2f-px33-4vv5
  • GO-2026-5985 GHSA-7rx3-5wx3-5v76
  • GO-2026-5986 CVE-2026-61699 GHSA-cm26-5974-52h8
  • GO-2026-5987 CVE-2026-55513 GHSA-g4x6-jcvr-9m3g
  • GO-2026-5988 CVE-2026-54628 GHSA-hwrq-8wxh-q4xv
  • GO-2026-5989 CVE-2026-55512 GHSA-m3cx-mwpg-32jg
  • GO-2026-5990 CVE-2026-54629 GHSA-mf78-3rpf-r784
  • GO-2026-5991 CVE-2026-53603 GHSA-q4vm-pq3q-8wgq
  • GO-2026-5992 CVE-2026-61549 GHSA-qf34-295c-26v8
  • GO-2026-5996 CVE-2026-54450 GHSA-pph6-vfjv-vpjw
  • GO-2026-5997 CVE-2026-54452 GHSA-xgch-x3mx-cm3c
  • GO-2026-5998 CVE-2026-54495 GHSA-398h-7f66-3h4p
  • GO-2026-5999 CVE-2026-10814 GHSA-jh6h-v6mp-h22v
  • GO-2026-6002 CVE-2026-58196 GHSA-pr64-jmmf-jp54
  • GO-2026-6003 CVE-2026-53714 GHSA-22xc-xg2r-9j7v
  • GO-2026-6004 CVE-2026-52833 GHSA-3v79-m2cg-89ww
  • GO-2026-6005 CVE-2026-53715 GHSA-8fv2-88gg-hm7q
  • GO-2026-6006 CVE-2026-53716 GHSA-cxpq-8v7q-cg56 *…
Record
openSUSE-SU-2026:21483-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
github.com/siyuan-note/siyuan/kernel
Go
 through 0.0.0-20260421031503-96dfe0bea474
0.0.0-20260512140701-d7b77d945e0d
github.com/siyuan-note/siyuan/kernel
Go
 before 0.0.0-20260512140701-d7b77d945e0d
0.0.0-20260512140701-d7b77d945e0d
govulncheck-vulndb
openSUSE:Leap 16.0
From an advisory covering 1734 CVEs
 before 0.0.20260723T184607-160000.1.1
0.0.20260723T184607-160000.1.1

History

History
RecordedChangedSources
affected, facts
first indexedCVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-44670 is a critical vulnerability (CVSS 9.4) in Siyuan-note Siyuan, published May 8, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.51%, the 43rd percentile. Fixed in github.com/siyuan-note/siyuan/kernel 0.0.0-20260512140701-d7b77d945e0d.

References

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