External Control of File Name or Path Affecting @backstage/plugin-scaffolder-backend-module-confluence-to-markdown package, versions <0.3.25
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Start learning- Snyk IDSNYK-JS-BACKSTAGEPLUGINSCAFFOLDERBACKENDMODULECONFLUENCETOMARKDOWN-20826428
- published11 Oct 2026
- disclosed7 Oct 2026
- creditUnknown
Introduced: 7 Oct 2026
NewCVE-2026-106559 (opens in a new tab)How to fix?
Upgrade @backstage/plugin-scaffolder-backend-module-confluence-to-markdown to version 0.3.25 or higher.
Overview
@backstage/plugin-scaffolder-backend-module-confluence-to-markdown is a The confluence-to-markdown module for @backstage/plugin-scaffolder-backend
Affected versions of this package are vulnerable to External Control of File Name or Path via the getAndWriteAttachments function in helpers.ts, where the downloadTitle value derived from a Confluence attachment name is concatenated directly into a filesystem path without sanitization. An attacker who can control attachment names in a Confluence space can supply a path-traversal sequence (e.g. ../../) as the attachment title, causing files to be written to arbitrary locations on the server outside the intended docs/img directory.