odf-kit has HTML injection leading to XSS in odsToHtml() via unescaped style attribute values

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS

6.1 · CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

EPSS

No dated EPSS signal available.

As published by the source; long descriptions are shortened.

Summary ODF style values are interpolated into style="..." attributes without HTML-escaping in odf-kit's ODS to-HTML renderer (odsToHtml()). A double-quote character inside an attacker-controlled style value breaks out of the attribute, allowing arbitrary HTML/attribute injection — and therefore script execution (XSS) — from a crafted .ods file wherever the rendered output is inserted as HTML, which is the documented purpose of the function. Details Two emission sites in src/ods/to-html/html-renderer.ts (before 0.14.0, src/ods-reader/html-renderer.ts) write document-controlled values into a style attribute without escaping: - Cell style. buildInlineStyle() assembles a CSS string from the cell's formatting properties (fo:color, fo:font-size, fo:font-family, fo:background-color, fo:text-align, etc.) with no escaping, and renderCell emits it raw as the cell's style attribute. - Row height. row.height (from style:row-height) is emitted raw into the row element's style attribute. The same…

Published by the source

23 Oct 2026, 20:55 UTC

Last modified by the source

23 Oct 2026, 21:00 UTC

Source last checked

26 Oct 2026, 13:07 UTC

1. Revision 3 · amended · 26 Oct 2026

   Amended from ghsa record GHSA-2rqm-h6hv-g79v

2. Revision 2 · amended · 24 Oct 2026

   Amended from osv record GHSA-2rqm-h6hv-g79v

3. Revision 1 · created · 23 Oct 2026

   Published from ghsa record GHSA-2rqm-h6hv-g79v

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# Patch Next advisory brief: GHSA-2rqm-h6hv-g79v

Advisory: odf-kit has HTML injection leading to XSS in odsToHtml() via unescaped style attribute values
IDs: GHSA-2rqm-h6hv-g79v
Record: https://patchnext.com/advisories/ghsa-2rqm-h6hv-g79v (revision 3, source checked 26 Oct 2026, 13:07 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Medium (CVSS 6.1)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: odf-kit 0.14.2. A vendor fix does not mean a deployment is fixed.

## Affected components
- npm odf-kit: affected >= 0.9.8, < 0.14.2; fixed in 0.14.2

## Suggested inspection (read-only)
- `npm ls odf-kit --all`: lists every installed copy and version, including transitive ones. Run in the project root after `npm ci`.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on odf-kit.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://github.com/advisories/GHSA-2rqm-h6hv-g79v (GitHub-reviewed advisory GHSA-2rqm-h6hv-g79v lists affected ranges: npm odf-kit >=0.9.8 <0.14.2)
- Verified: https://osv.dev/vulnerability/GHSA-2rqm-h6hv-g79v (OSV record GHSA-2rqm-h6hv-g79v lists affected ranges: npm odf-kit >=0.9.8 <0.14.2 (fixed))

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