Description
Gotenberg is a Docker-powered stateless API for PDF files. From 8.10.0 until 8.33.0, the newContext function in pkg/modules/api/context.go starts one errgroup.Go goroutine for each multipart downloadFrom entry and allows those goroutines to concurrently write to the shared ctx.files, ctx.diskToOriginal, and ctx.filesByField maps and slices. Go maps and slices are not safe for concurrent mutation, so a crafted multipart request containing many downloadFrom entries can trigger a data race and terminate the process with a fatal concurrent map writes runtime error. The default configuration enables downloadFrom and disables authentication, allowing an unauthenticated remote attacker to crash an exposed conversion service and cause a denial of service. This issue is fixed in version 8.33.0.
Published: 2026-08-19
Score: 7.5 High
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-vp73-vjw8-8f32 Gotenberg has a Race Condition via Multipart `downloadFrom` Handling
History

Wed, 19 Aug 2026 16:15:00 +0000

Type Values Removed Values Added
First Time appeared Gotenberg
Gotenberg gotenberg
Vendors & Products Gotenberg
Gotenberg gotenberg

Wed, 19 Aug 2026 14:45:00 +0000

Type Values Removed Values Added
Description Gotenberg is a Docker-powered stateless API for PDF files. From 8.10.0 until 8.33.0, the newContext function in pkg/modules/api/context.go starts one errgroup.Go goroutine for each multipart downloadFrom entry and allows those goroutines to concurrently write to the shared ctx.files, ctx.diskToOriginal, and ctx.filesByField maps and slices. Go maps and slices are not safe for concurrent mutation, so a crafted multipart request containing many downloadFrom entries can trigger a data race and terminate the process with a fatal concurrent map writes runtime error. The default configuration enables downloadFrom and disables authentication, allowing an unauthenticated remote attacker to crash an exposed conversion service and cause a denial of service. This issue is fixed in version 8.33.0.
Title Gotenberg: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
Weaknesses CWE-362
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}


Subscriptions

Gotenberg Gotenberg
cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-08-19T15:29:39.998Z

Reserved: 2026-05-13T06:54:34.220Z

Link: CVE-2026-45742

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-08-19T15:17:05.170

Modified: 2026-08-19T16:17:11.717

Link: CVE-2026-45742

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-19T16:00:04Z

Weaknesses