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CVE-2026-72798 high CVSS 8.6

Vulnerability in github.com/siyuan-note/siyuan/kernel (CVE-2026-72798)

Summary

Vulnerability in github.com/siyuan-note/siyuan/kernel (CVE-2026-72798). Confidential information can be exposed externally. Exploitable via renderAttributeView. Mitigation: upgrade to 0.0.0-20260724121519-426991d155c0 or later.

Original description

The description as published by the source.

CVE: This vulnerability corresponds to CVE-2026-72798.

Summary

renderAttributeView correctly applies the reader publish-access filter, but the filter's row-accessibility decision is keyed solely to the row's first cell, and it never inspects the remaining cells' values. Relation and Rollup cells carry mirrored content from a different database, so a row belonging to a published database can hand an anonymous reader the contents of a related database whose host document is hidden, publish-forbidden, or password-protected. Separately, when the first column is not a block value the accessibility check is skipped entirely and the row is returned unchecked.

Note:

This is distinct from the previously reported password-tier omission in the same function that concerns the row's own primary block, whereas these two defects concern (a) other cells' related-database content, which no row-level check covers and (b) rows where the first cell is not a block at all. A fix to the row-drop condition alone would close neither.

Details

renderAttributeView applies the filter (kernel/api/av.go:68):

retDataMap["view"] = model.FilterViewByPublishAccess(c, publishAccess, retDataMap["view"].(av.Viewable))

Inside FilterViewByPublishAccess (kernel/model/publish_access.go):

if row.Cells[0].Value.Block != nil {
    bt = treenode.GetBlockTree(row.Cells[0].Value.Block.ID)
}
if bt != nil {
    if !Check…

Source: NIST National Vulnerability Database 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-2026-72798 has been found in github.com/siyuan-note/siyuan/kernel.
Attackers can target a specific entry point like renderAttributeView over the network to misuse the product.
Confidential information can be exposed externally. CVSS score: 8.6/10.
What to do: upgrade github.com/siyuan-note/siyuan/kernel to 0.0.0-20260724121519-426991d155c0 or later.
If unsure, ask your IT team or search "github.com/siyuan-note/siyuan/kernel CVE-2026-72798" on the vendor's site.

CVE-2026-72798 (github.com/siyuan-note/siyuan/kernel) — CWE-862 / CVSS v3 8.6
Attack vector: remote (network-reachable) / unauthenticated / no user interaction
Attack surface: renderAttributeView / FilterViewByPublishAccess / relationDestAv / Relation.Contents
Patched: 0.0.0-20260724121519-426991d155c0 — 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 renderAttributeView without authentication.

📍 Affected scope

Check the vendor advisory for the affected versions of github.com/siyuan-note/siyuan/kernel. Attack surface: renderAttributeView / FilterViewByPublishAccess / relationDestAv / Relation.Contents.

🔥 Severity

Severity: High (CVSS 8.6/10). Confidential information can be exposed externally.

🔧 How to fix

Update to 0.0.0-20260724121519-426991d155c0.

🛡️ 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

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
    Apply patch patch 
    Upgrade github.com/siyuan-note/siyuan/kernel to 0.0.0-20260724121519-426991d155c0

    ステージング環境で 0.0.0-20260724121519-426991d155c0 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を含めること。

  3. 3
    Post-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。本番ではアクセスログ・WAF 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":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.0.0-20260724121519-426991d155c0"}]}]

References

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