# CVE-2026-73044: SiYuan before v3.7.4 Stored Cross-Site Scripting via Column Width

> Attackers can inject malicious scripts via table column widths, leading to arbitrary code execution in the Electron renderer.

- **Severity:** Critical 9.4 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 15 Aug 2026
- **Updated:** 17 Aug 2026
- **Also known as:** GHSA-jm87-g579-58rh

## What is CVE-2026-73044?

CVE-2026-73044 is a critical cross-site scripting vulnerability in siyuan-note siyuan, published on 15 Aug 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

### Official description

SiYuan versions before v3.7.4 fail to validate or escape table column width values, allowing stored cross-site scripting injection into style attributes. Attackers can inject malicious payloads through the setAttrViewColWidth API that break out of style attributes and inject event handlers on every table cell, executing arbitrary code in the Electron renderer with Node integration enabled.

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

## Which versions are affected by CVE-2026-73044?


## How do I fix CVE-2026-73044?

No fix has been published for CVE-2026-73044 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-73044 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-73044 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-73044 and fix it if it is affected.

What it is: CVE-2026-73044 is a critical cross-site scripting vulnerability in siyuan-note siyuan, published on 15 Aug 2026. Any signed-in user can exploit it over the network, 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-2026-73044 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-2026-73044/ (Markdown: https://insights.sbomify.com/CVE-2026-73044/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-73044
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-73044
- OSV: https://osv.dev/vulnerability/CVE-2026-73044

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-73044/
Summaries are generated and may contain mistakes; the official description above is the record.