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CVE-2026-73607 medium CVSS 5.8

Vulnerability in github.com/siyuan-note/siyuan/kernel (CVE-2026-73607)

Summary

Vulnerability in github.com/siyuan-note/siyuan/kernel (CVE-2026-73607). Risk of unauthorized operations or information disclosure. Exploitable via POST /api/storage/setOutlineStorage. Mitigation: upgrade to 0.0.0-20260812083335-251596fc0de2 or later.

Original description

The description as published by the source.

Summary

/api/storage/getOutlineStorage is registered with CheckAuth only and performs no authorization of any kind. Given a document identifier it returns that document's stored outline state, regardless of the document's publish tier.

The two write endpoints for the same data, setOutlineStorage and removeOutlineStorage, both carry CheckAdminRole and CheckReadonly. Only the read path is unguarded.

Details

Routes. kernel/api/router.go:103 on master, :108 on the development branch:

ginServer.Handle("POST", "/api/storage/getOutlineStorage",    model.CheckAuth, getOutlineStorage)
ginServer.Handle("POST", "/api/storage/setOutlineStorage",    model.CheckAuth, model.CheckAdminRole, model.CheckReadonly, setOutlineStorage)
ginServer.Handle("POST", "/api/storage/removeOutlineStorage", model.CheckAuth, model.CheckAdminRole, model.CheckReadonly, removeOutlineStorage)

Handler. kernel/api/storage.go:466 on the development branch, :469 on master, identical. It binds docID and calls model.GetOutlineStorage(docID), which iterates the stored outline documents and returns the entry whose DocID matches. There is no filter function on this path at all: no *gin.Context, no publish-access check, no password check, no visibility check. The caller supplies the identifier and receives the payload.

What is stored. type OutlineDoc { DocID string; Data map[string]any }. The client writes it from app/src/layout/dock/Outline.ts:742:

Source: GitHub Security Advisories (Global) NVD GitHub Advisory

Auto-generated summary

Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.

A vulnerability tracked as CVE-2026-73607 has been found in github.com/siyuan-note/siyuan/kernel.
Attackers can target a specific entry point like POST /api/storage/setOutlineStorage over the network to misuse the product.
Risk of unauthorized operations or information disclosure. CVSS score: 5.8/10.
What to do: upgrade github.com/siyuan-note/siyuan/kernel to 0.0.0-20260812083335-251596fc0de2 or later.
If unsure, ask your IT team or search "github.com/siyuan-note/siyuan/kernel CVE-2026-73607" on the vendor's site.

CVE-2026-73607 (github.com/siyuan-note/siyuan/kernel) — CWE-862 / CVSS v3 5.8
Attack vector: remote (network-reachable) / unauthenticated / no user interaction
Attack surface: POST /api/storage/setOutlineStorage / CheckAuth / setOutlineStorage / removeOutlineStorage
Patched: 0.0.0-20260812083335-251596fc0de2 — 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

A vulnerability (CWE-862) exists in github.com/siyuan-note/siyuan/kernel. Attackers reach the vulnerable code path via POST /api/storage/setOutlineStorage without authentication.

📍 Affected scope

Check the vendor advisory for the affected versions of github.com/siyuan-note/siyuan/kernel. Attack surface: POST /api/storage/setOutlineStorage / CheckAuth / setOutlineStorage / removeOutlineStorage.

🔥 Severity

Severity: Medium (CVSS 5.8/10). Risk of unauthorized operations or information disclosure.

🔧 How to fix

Update to 0.0.0-20260812083335-251596fc0de2.

🛡️ 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 POST /api/storage/setOutlineStorage requests with malformed payloads or SQL meta-characters. 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

Concrete steps and command examples for SOC/SRE teams to execute in order

  1. 1
    Identify 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。

  2. 2
    Hunt for indicators of compromise detect 
    grep 'POST /api/storage/setOutlineStorage' /var/log/nginx/access.log | grep -E '(unusual_payload|sqli_pattern)'

    アクセスログで POST /api/storage/setOutlineStorage への異常なリクエスト (不正な認証ヘッダ・SQLメタ文字)を過去 30〜90日分捜索。WAF/SIEM があれば該当パスのアラート発火履歴を確認。

  3. 3
    Apply patch patch 
    Upgrade github.com/siyuan-note/siyuan/kernel to 0.0.0-20260812083335-251596fc0de2

    ステージング環境で 0.0.0-20260812083335-251596fc0de2 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 2 で見つけた異常検知の続報チェックを含めること。

  4. 4
    Post-deployment verification verify 
    Replay attack against POST /api/storage/setOutlineStorage on staging to confirm patch closes the vector

    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 2 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":"0.0.0-20260812083335-251596fc0de2"}]}]

References

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