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CVE-2026-42593— Gotenberg: Arbitrary PDF read via stampExpression and watermarkExpression in merge, split, and convert routes

CVSS 5.3 · Medium EPSS 0.04% · P12
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I. Basic Information for CVE-2026-42593

Vulnerability Information
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Vulnerability Title
Gotenberg: Arbitrary PDF read via stampExpression and watermarkExpression in merge, split, and convert routes
Source: NVD (National Vulnerability Database)
Vulnerability Description
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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: NVD (National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
gotenberggotenberg < 8.32.0 -

II. Public POCs for CVE-2026-42593

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III. Intelligence Information for CVE-2026-42593

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Same Patch Batch · gotenberg · 2026-05-14 · 10 CVEs total

CVE-2026-425899.8 CRITICALGotenberg: Unauthenticated RCE via ExifTool Metadata Key Injection
CVE-2026-425969.4 CRITICALGotenberg: Unauthenticated SSRF via default deny-list bypass in downloadFrom and webhook
CVE-2026-425958.6 HIGHGotenberg: Server-Side Request Forgery via Chromium URL Endpoint with Redirect-Based Deny-
CVE-2026-425918.2 HIGHGotenberg: Server-Side Request Forgery (SSRF) in github.com/gotenberg/gotenberg/v8
CVE-2026-425908.2 HIGHGotenberg: ExifTool group-prefix syntax bypasses dangerous-tag blocklist
CVE-2026-408938.2 HIGHGotenberg: ExifTool Dangerous Tag Blocklist Bypass via Group-Prefixed Tag Names Allows Arb
CVE-2026-425947.5 HIGHGotenberg: Unauthenticated denial of service via echo.Context pool reuse in webhook async
CVE-2026-425975.9 MEDIUMGotenberg: Chromium URL conversion routes read arbitrary files under /tmp via file:// sche
CVE-2026-425925.3 MEDIUMGotenberg: DNS rebinding bypasses SSRF validation on Chromium URL conversion routes

IV. Related Vulnerabilities

Same product: gotenberg
Same vendor: gotenberg
Same weakness: CWE-22

V. Comments for CVE-2026-42593

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