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CVE-2026-34585
Cross-Site Scripting (XSS) in github.com/siyuan-note/siyuan/kernel (CVE-2026-34585)
Summary
cross-site scripting in github.com/siyuan-note/siyuan/kernel (CVE-2026-34585). Successful exploitation can lead to full system takeover. Exploitable via ``escapeNodeAttributeValues``. Mitigation: upgrade to `0.0.0-20260329142331-918d1bd9f967` or later.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **CVE-2026-34585** has been found in github.com/siyuan-note/siyuan/kernel.
Attackers can target a specific entry point like ``escapeNodeAttributeValues`` over the network to misuse the product.
Successful exploitation can lead to full system takeover. CVSS score: ?/10.
What to do: upgrade github.com/siyuan-note/siyuan/kernel to **0.0.0-20260329142331-918d1bd9f967** or later.
If unsure, ask your IT team or search "github.com/siyuan-note/siyuan/kernel CVE-2026-34585" on the vendor's site.
CVE-2026-34585 (github.com/siyuan-note/siyuan/kernel) — CWE-79 /
Attack vector: local / unauthenticated
Attack surface: `escapeNodeAttributeValues` / `node.KramdownIAL` / `KramdownIAL` / `needsEscapeForValue`
Patched: `0.0.0-20260329142331-918d1bd9f967` — apply immediately
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
❓ What is the problem
**Cross-site scripting (XSS)** (CWE-79) exists in github.com/siyuan-note/siyuan/kernel. Attackers reach the vulnerable code path via ``escapeNodeAttributeValues`` without authentication.
📍 Affected scope
github.com/siyuan-note/siyuan/kernel — . Attack surface: `escapeNodeAttributeValues` / `node.KramdownIAL` / `KramdownIAL` / `needsEscapeForValue`.
🔥 Severity
Severity: ?. Successful exploitation can lead to full system takeover
🔧 How to fix
Update to **0.0.0-20260329142331-918d1bd9f967**.
🛡️ Workaround
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
🔍 Detection
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run `grep -r 'github.com/siyuan-note/siyuan/kernel' .` against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
Response Actions (7 steps)
Concrete steps and command examples for SOC/SRE teams to execute in order
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1Identify exposure identify
grep -r 'github.com/siyuan-note/siyuan/kernel' . | grep -v node_modulesリポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で `github.com/siyuan-note/siyuan/kernel` を grep し、稼働しているサービス・バージョンを把握する。
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6Apply patch patch
Upgrade github.com/siyuan-note/siyuan/kernel to 0.0.0-20260329142331-918d1bd9f967ステージング環境で 0.0.0-20260329142331-918d1bd9f967 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスと、Step 3 で見つけた異常検知の続報チェックを含めること。
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7Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番では Step 3 と同じログクエリでアラート再発が無いか継続監視。
Affected packages
Go
github.com/siyuan-note/siyuan/kernel
[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"0.0.0-20260329142331-918d1bd9f967"}]}]
References
- advisory https://nvd.nist.gov/vuln/detail/CVE-2026-34585
- package https://github.com/siyuan-note/siyuan
- web https://github.com/siyuan-note/siyuan/security/advisories/GHSA-ff66-236v-p4fg
- web https://github.com/siyuan-note/siyuan/commit/918d1bd9f967d888f474f6764744a3d8cca4a501
- web https://github.com/siyuan-note/siyuan/issues/17246
- web https://github.com/siyuan-note/siyuan/releases/tag/v3.6.2