# CVE-2026-65605: SiYuan before v3.7.2 Stored XSS to RCE via Attribute View

> Stored XSS in SiYuan allows arbitrary command execution via nodeIntegration when viewing malicious database entries.

- **Severity:** Critical 9.4 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 23 Jul 2026
- **Updated:** 17 Sep 2026
- **Also known as:** GHSA-99f6-8pmj-83xw, GHSA-pw5c-qhf3-jhwh

## What is CVE-2026-65605?

CVE-2026-65605 is a critical cross-site scripting vulnerability in siyuan-note siyuan, published on 23 Jul 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

SiYuan before v3.7.2 contains a stored cross-site scripting vulnerability in Attribute View (database) cell rendering. A Template column value is rendered as HTML via text/template without auto-escaping, and EscapeHTML is only applied when HasUnclosedHtmlTag returns true; because balanced self-closing tags such as <img> are skipped by that check, a payload like <img src=x onerror=...> is stored unescaped and later inserted into the page via innerHTML, executing when the database is viewed. Because the desktop renderer runs with nodeIntegration enabled, the injected script can reach require and escalate to arbitrary command execution.

Weakness: CWE-79 (Improper Neutralization of Input During Web Page Generation)

## Which versions are affected by CVE-2026-65605?


## How do I fix CVE-2026-65605?

No fix has been published for CVE-2026-65605 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-65605 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-65605 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-65605 and fix it if it is affected.

What it is: CVE-2026-65605 is a critical cross-site scripting vulnerability in siyuan-note siyuan, published on 23 Jul 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-65605 exists.

Affected product: siyuan-note siyuan. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-65605/ (Markdown: https://insights.sbomify.com/CVE-2026-65605/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-65605
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-65605
- OSV: https://osv.dev/vulnerability/CVE-2026-65605

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-65605/
Summaries are generated and may contain mistakes; the official description above is the record.