CVE-2026-42597

MEDIUM

Gotenberg: Chromium URL conversion routes read arbitrary files under /tmp via file:// scheme

Title source: cna
STIX 2.1

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.

References (1)

Core 1
Core References

Scores

CVSS v3 5.9
EPSS 0.0025
EPSS Percentile 16.2%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact partial

Details

CWE
CWE-73 CWE-918
Status published
Products (3)
gotenberg/gotenberg 0 - 8.32.0Go
gotenberg/gotenberg < 8.32.0
thecodingmachine/gotenberg < 8.32.0
Published May 14, 2026
Tracked Since May 14, 2026