Is CVE-2026-45742 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-45742 being exploited in the wild.

How severe is CVE-2026-45742?

High severity, with a CVSS score of 7.5, published 19 August 2026.

Which products and versions are affected?

github.com/gotenberg/gotenberg/v7 (Go) SEMVER:introduced=0; github.com/gotenberg/gotenberg/v8 (Go) >= 8.10.0, = 8.10.0, <= 8.32.0.

Is there a fix for CVE-2026-45742?

Yes. github.com/gotenberg/gotenberg/v8 (Go): upgrade to 8.33.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-45742 attacked?

It is attacked over the network, in a software library.

Am I affected by CVE-2026-45742?

Check whether you run github.com/gotenberg/gotenberg/v7 (Go), github.com/gotenberg/gotenberg/v8 (Go) or Gotenberg at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-45742: Gotenberg race condition in multipart downloadFrom handling

Q: Is there a fix for CVE-2026-45742?

Yes. github.com/gotenberg/gotenberg/v8 (Go): upgrade to 8.33.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

Q: How is CVE-2026-45742 attacked?

It is attacked over the network, in a software library.

Q: Am I affected by CVE-2026-45742?

Check whether you run github.com/gotenberg/gotenberg/v7 (Go), github.com/gotenberg/gotenberg/v8 (Go) or Gotenberg at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-45742 · Severity: high · CVSS 7.5 · Published 2026-08-19

Gotenberg, a tool used for converting various document formats into PDFs, is vulnerable to a denial-of-service attack. An attacker can send a specially crafted request that causes the service to crash by triggering a race condition during file processing. This results in the service becoming unavailable to users, potentially disrupting automated document workflows.

Technologies: github.com/gotenberg/gotenberg/v7 (Go), github.com/gotenberg/gotenberg/v8 (Go), Gotenberg. Vendors: Go, Gotenberg.

Quick answers

Is CVE-2026-45742 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-45742 being exploited in the wild.
How severe is CVE-2026-45742?: High severity, with a CVSS score of 7.5, published 19 August 2026.
Which products and versions are affected?: github.com/gotenberg/gotenberg/v7 (Go) SEMVER:introduced=0; github.com/gotenberg/gotenberg/v8 (Go) >= 8.10.0, <= 8.32.0, SEMVER:introduced=8.10.0,fixed=8.33.0; Gotenberg >= 8.10.0, <= 8.32.0.
Is there a fix for CVE-2026-45742?: Yes. github.com/gotenberg/gotenberg/v8 (Go): upgrade to 8.33.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-45742 attacked?: It is attacked over the network, in a software library.
Am I affected by CVE-2026-45742?: Check whether you run github.com/gotenberg/gotenberg/v7 (Go), github.com/gotenberg/gotenberg/v8 (Go) or Gotenberg at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

github.com/gotenberg/gotenberg/v8 (Go): upgrade to 8.33.0 or later
```
go get github.com/gotenberg/gotenberg/v8@v8.33.0
```

Technical details

A race condition exists in Gotenberg's `pkg/modules/api/context.go` within the `newContext` function. When processing multipart requests containing multiple `downloadFrom` entries, the application spawns concurrent goroutines to download files. These goroutines attempt to write to shared request context maps (`ctx.files`, `ctx.diskToOriginal`, and `ctx.filesByField`) without proper synchronization. Because Go maps are not thread-safe for concurrent writes, a crafted request can trigger a runtime panic (`fatal error: concurrent map writes`), leading to process termination. This can be exploited by an unauthenticated remote attacker if the default configuration (authentication disabled) is used. The issue is resolved in version 8.33.0.

Affected products

Gotenberg Gotenberg >= 8.10.0, <= 8.32.0

Identifiers

CVE-2026-45742
GHSA-vp73-vjw8-8f32
GO-2026-5669

Timeline

2026-05-29: disclosed
2026-05-29: advisory
2026-05-29: patched: Fixed in version 8.33.0

References

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