How severe is CVE-2026-72808?

No CVSS score has been assigned to CVE-2026-72808 yet. Review the advisory details and affected package list to assess your exposure.

Which packages are affected by CVE-2026-72808?

CVE-2026-72808 affects the following packages: github.com/siyuan-note/siyuan/kernel (Go). Ecosystems affected: Go.

How do I fix CVE-2026-72808?

Update github.com/siyuan-note/siyuan/kernel to 0.0.0-20260723031702-509b35055940 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2026-72808 is resolved across your whole dependency graph.

How do I detect CVE-2026-72808 in my Go dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for github.com/siyuan-note/siyuan/kernel, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

How do I mitigate CVE-2026-72808 if there is no patch (or I can't update yet)?

Resolve every user-supplied path to its canonical form and reject anything that escapes the intended directory, and run the component under an account that has no read or write access outside the directory it legitimately serves.

Is CVE-2026-72808 actively exploited in the wild?

No public exploit code has been indexed for CVE-2026-72808 yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

What is the EPSS score for CVE-2026-72808?

CVE-2026-72808 has an EPSS (Exploit Prediction Scoring System) score of 0.4%, placing it in the 29th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score indicates relatively lower exploitation probability, though the CVSS severity should still guide your patching priority.

What type of vulnerability is CVE-2026-72808?

CVE-2026-72808 is classified as CWE-862 (CWE-862). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation.

When was CVE-2026-72808 published, and has it been updated?

CVE-2026-72808 was published on August 12, 2026 and was last updated on October 28, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

🐹 Go

Not in CISA KEV

CVE-2026-72808 — kernel

Fix: siyuan-note/siyuan@509b350

CVE-2026-72808 is a CWE-862 vulnerability in github.com/siyuan-note/siyuan/kernel. A fix is available for github.com/siyuan-note/siyuan/kernel — see the affected versions and patch details below.

SiYuan before v3.7.4 Information Disclosure via getFileAnnotation

Also known asGHSA-v7ph-r5r6-4jcjGO-2026-6406

Published

Aug 12, 2026

Updated

Oct 28, 2026

Affected

1 pkg

Patched

1 / 1

Exploits

None indexed

Exploitation data as of Nov 3, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

Proof-of-concept exploit code exists

CISA’s SSVC triage found public proof-of-concept exploit code for this CVE, though no confirmed active exploitation.
CISA assesses this as automatable — exploitation doesn’t require manual, per-target effort, which raises the odds of mass scanning and opportunistic attacks.

Exploitation and automatability from CISA’s SSVC triage for CVE-2026-72808.

EPSS Exploitation Probability

via FIRST.org ↗

0.4%probability of exploitation in next 30 days

Lower Risk+0.07%

Lower risk than most CVEs29th percentile — riskier than 29% of all scored CVEsHighest risk

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

Real-World Exposure

1 pkg affected

🐹github.com/siyuan-note/siyuan/kernel

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Go packages — download data is not available via public APIs for these ecosystems.

Description

CVE: This vulnerability corresponds to CVE-2026-72808.

Summary

The /api/asset/getFileAnnotation endpoint returns the content of .sya PDF-annotation files with no publish-access check. It is gated by CheckAuth only, so it is reachable by the publish RoleReader token and by the anonymous account when Publish.Auth.Enable is false. Its sibling, the /assets/* asset route does enforce publish access, including the publish password. An anonymous reader who knows an asset path can therefore read the private PDF annotations (highlights, notes) attached to assets in publish-forbidden, password-protected, or unpublished documents.

Details

getFileAnnotation resolves the annotation file via GetAssetAbsPathInBox (no path traversal) and returns the .sya content. Unlike the /assets/* route, which applies the publish-access filter including password enforcement before serving asset bytes, getFileAnnotation applies no publish-access, publish-ignore, or password check. The guarded-sibling asymmetry indicates the boundary is meant to apply to this data and was omitted here.

.sya files for encrypted-box assets are fail-closed and not exposed. The gap is limited to non-encrypted assets.

Route / auth tier. getFileAnnotation is registered CheckAuth-only. CheckAuth admits RoleReader; the publish proxy forwards port-6808 traffic with a Reader JWT (anonymous when publish auth is disabled).

Proof of Concept

Reproduced on a local instance (publish mode on 6808, Basic Auth off).

Setup (admin, 6806):

createNotebook{name:"AnnotPoc"} → box
createDocWithMd{notebook, path:"/annot-victim", markdown:"doc with a pdf"} → doc
POST /api/asset/upload (multipart id=<doc>, file[][email protected]) → assets/secret-...pdf
setFileAnnotation{path:"<asset>.sya", data:"{annotSecret:ANNOT_SECRET_4471,note:private highlight}"}
setPublishAccess{id:<doc>, visible:false, password:"", disable:true} → doc forbidden

Exploit (anonymous reader, 6808, no token):

POST http://127.0.0.1:6808/api/asset/getFileAnnotation
{"path":"assets/secret-...pdf.sya"}

Returns:

{"code":0,"data":{"data":"{\"annotSecret\":\"ANNOT_SECRET_4471\",\"note\":\"private highlight\"}"}}

The annotation content of a publish-forbidden document is returned to an anonymous reader with no publish-access check, while the /assets/* route serving the same asset class enforces publish access and password.

Impact

An anonymous reader (publish mode with auth disabled) or any publish RoleReader can read the private PDF annotations (highlights and notes) of assets belonging to publish-forbidden, password-protected, or unpublished documents, given the asset path. This defeats the publish-access/password boundary for annotation data. Scope is limited to annotated PDFs in non-encrypted notebooks; encrypted-box annotations are not exposed. Confidentiality-only.

Suggested fix

Apply the same publish-access check the /assets/* route uses to getFileAnnotation resolve the asset's owning document and enforce the publish-access/publish-ignore / password check before returning .sya content.

Affected Packages

1 total 1 fixed

Ecosystem	Package	Vulnerable range	Fix
🐹Go	`github.com/siyuan-note/siyuan/kernel`	all versions	0.0.0-20260723031702-509b35055940`go get github.com/siyuan-note/siyuan/kernel@v0.0.0-20260723031702-509b35055940`

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for github.com/siyuan-note/siyuan/kernel, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update github.com/siyuan-note/siyuan/kernel to 0.0.0-20260723031702-509b35055940 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2026-72808 is resolved across your whole dependency graph.
Workarounds
Resolve every user-supplied path to its canonical form and reject anything that escapes the intended directory, and run the component under an account that has no read or write access outside the directory it legitimately serves.

Frequently Asked Questions

**CVE:** This vulnerability corresponds to [CVE-2026-72808](https://nvd.nist.gov/vuln/detail/CVE-2026-72808). ### Summary The `/api/asset/getFileAnnotation` endpoint returns the content of `.sya` PDF-annotation files with no publish-access check. It is gated by `CheckAuth` only, so it is reachable by the publish `RoleReader` token and by the anonymous account when `Publish.Auth.Enable` is `false`. Its sibling, the `/assets/*` asset route does enforce publish access, including the publish password. An anonymous reader who knows an asset path can therefore read the private PDF annotations (hig

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