# CVE-2026-113787: odf-kit: HTML injection leading to XSS in odtToHtml() via unescaped style attribute values


- **Severity:** Medium 6.1 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Fix available:** No
- **Published:** 21 Oct 2026
- **Updated:** 21 Oct 2026
- **Also known as:** GHSA-3cgg-c5pp-57h6

## What is CVE-2026-113787?

CVE-2026-113787 is a medium-severity vulnerability in GitHubNewbie0 odf-kit, published on 21 Oct 2026. 

### Official description

odf-kit allows users to generate, fill, read, and convert OpenDocument Format files (.odt, .ods) in TypeScript and JavaScript. Starting in version 0.6.0 and prior to version 0.14.2, he renderer has an `escapeHtml()` helper and applies it consistently to text content and to attribute values — `href`, `src`, `alt`, `id`, `data-author`, `data-date`, citation text all go through it. The inline CSS strings do not. In `renderTextSpan` (`dist/odt/to-html/html-renderer.js:195`), the value of e.g. `fo:color` is copied from the document into `style.fontColor` verbatim by the parser (`extractSpanStyle`, read/parser.js:348), then concatenated raw into the attribute. A `"` in the value terminates the attribute early. The same unescaped `style="${...}"` pattern appears at roughly ten other emission sites: paragraph and heading (`paragraphStyleToCss`), table cells and rows (`cellStyleToCss`, `rowStyleToCss`), `<col>`, and the image style attribute. The affected source attributes include `fo:color`, `fo:background-color`, `fo:text-shadow`, `fo:letter-spacing`, `fo:font-family` (via both direct and font-face resolution), `fo:margin-*`, `fo:padding-*`, `fo:line-height`, `fo:border*`, and `style:vertical-align`. Version 0.14.2 contains a patch.

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

## Which versions are affected by CVE-2026-113787?


## How do I fix CVE-2026-113787?

No fix has been published for CVE-2026-113787 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-113787 being exploited?

There is no known exploitation of CVE-2026-113787 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-113787 and fix it if it is affected.

What it is: CVE-2026-113787 is a medium-severity vulnerability in GitHubNewbie0 odf-kit, published on 21 Oct 2026. 
Exploitation: There is no known exploitation of CVE-2026-113787 in the wild and no public exploit code.

Affected product: GitHubNewbie0 odf-kit. 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-2026-113787/ (Markdown: https://insights.sbomify.com/CVE-2026-113787/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-113787
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-113787
- OSV: https://osv.dev/vulnerability/CVE-2026-113787

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-113787/
Summaries are generated and may contain mistakes; the official description above is the record.