CVE-2026-42593CWE-22CWE-73

Gotenberg: Arbitrary PDF read via stampExpression and watermarkExpression in merge, split, and convert routes

Medium · published May 14, 2026

CVSS v3.1
5.3
EPSS
0%
Percentile
33.2
In the wild
Unconfirmed
What it is

Gotenberg is a Docker-powered stateless API for PDF files. Prior to 8.32.0, pdfengines/merge, pdfengines/split, libreoffice/convert, chromium/convert/url, chromium/convert/html, and chromium/convert/markdown accept stampSource=pdf + stampExpression=/path and watermarkSource=pdf + watermarkExpression=/path from anonymous callers. The dedicated stamp/watermark routes require an uploaded file when the source type is image or pdf; these six routes only overwrite the expression when a file is uploaded, leaving the user-controlled path intact when no file is attached. pdfcpu opens the path and composites its pages onto the output PDF, which returns to the caller. An attacker reads any PDF the Gotenberg process can access on the container filesystem. This vulnerability is fixed in 8.32.0.

The record
Technical detail
CVSS v3.1
5.3 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.00401 · 33.2th percentile
Weaknesses
CWE-22 · Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal'); CWE-73 · External Control of File Name or Path
Published
2026-05-14T15:31Z
EPSS history
Timeline
  • 14 MAY 15:31Z
    Gotenberg: Arbitrary PDF read via stampExpression and watermarkExpression in merge, split, and convert routes
    cvelistv5