CVE-2026-45742Public exploitNetwork attack vectorHinoki check available

Unauthenticated service crash via concurrent map writes

Published Aug 19, 2026 · Updated Aug 19, 2026

Race condition in Gotenberg 8.10.0 through 8.32.0 allows remote attackers to crash the service via crafted multipart downloadFrom requests. In pkg/modules/api/context.go, newContext starts one errgroup.Go task per downloadFrom entry and lets those tasks concurrently mutate the shared ctx.files, ctx.diskToOriginal, and ctx.filesByField maps and slices before request handling completes. Default deployments enable downloadFrom and disable authentication, so internet-exposed instances can be terminated without credentials; the published impact is availability only.

CVSS severity7.5
High
EPSS probability0.60%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Race condition in Gotenberg 8.10.0 through 8.32.0 allows remote attackers to crash the service via crafted multipart downloadFrom requests. In pkg/modules/api/context.go, newContext starts one errgroup.Go task per downloadFrom entry and lets those tasks concurrently mutate the shared ctx.files, ctx.diskToOriginal, and ctx.filesByField maps and slices before request handling completes. Default deployments enable downloadFrom and disable authentication, so internet-exposed instances can be terminated without credentials; the published impact is availability only.

The record

CVE
CVE-2026-45742
Published
Aug 19, 2026
Updated
Aug 19, 2026
Vendor
Gotenberg
Product
Gotenberg
Classifications
CWE-362, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 19, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 19, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>= 8.10.0, < 8.33.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Gotenberg · Gotenbergversion=>= 8.10.0, < 8.33.0

Published CVSS scores

7.5GitHub Advisory DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
T1499Endpoint Denial of Service

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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