CVE-2026-45742 PUBLISHED

Gotenberg: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

Assigner: GitHub_M
Reserved: 13.05.2026 Published: 19.08.2026 Updated: 19.08.2026

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.

Metrics

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS Score: 7.5

Product Status

Vendor gotenberg
Product gotenberg
Versions
  • Version >= 8.10.0, < 8.33.0 is affected

References

Problem Types

  • CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') CWE