Description
Gotenberg is a Docker-powered stateless API for PDF files. Prior to 8.32.0, the /forms/chromium/convert/url and /forms/chromium/screenshot/url routes accept url=file:///tmp/... from anonymous callers. The default Chromium deny-list intentionally exempts file:///tmp/ so HTML/Markdown routes can load their own request-local assets, and those routes apply a per-request AllowedFilePrefixes guard to scope the read. The URL routes never set AllowedFilePrefixes, so the scope guard silently skips. Alice enumerates /tmp/, walks Gotenberg's per-request working directories, and reads the raw source files of other in-flight conversions as rendered PDF output. This vulnerability is fixed in 8.32.0.
Problem types
CWE-73: External Control of File Name or Path
CWE-918: Server-Side Request Forgery (SSRF)
Product status
References
github.com/...enberg/security/advisories/GHSA-g924-cjx7-2rjw
github.com/...enberg/security/advisories/GHSA-g924-cjx7-2rjw