Public proof of conceptFix available

CVE-2026-45742

Q: Is CVE-2026-45742 actively exploited?

A proof-of-concept exploit exists for CVE-2026-45742, but active exploitation has not been confirmed at this time.

Q: What is the CVSS score for CVE-2026-45742?

CVE-2026-45742 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

A public proof of concept exists; no exploitation attested.

Published2026-08-19
WeaknessCWE-362

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC

2026-08-1915:17CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2026-45742?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2026-45742?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

OSV

gotenberg/gotenberg

Branch	Affected	Fixed in	Source
—	all versions	no fix published	OSV

gotenberg/gotenberg

Branch	Affected	Fixed in	Source
8.x	≥ 8.10.0, < 8.33.0	8.33.0	OSV

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

No fix published by the sources we read yet. NVD record

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

NVDCVE recordread 2026-10-23
CISA-ADPSSVC decisionpoc2026-08-19
OpenCVESSVC decisionpoc—
CNACVSS 3.17.5read 2026-10-23
CNAweakness (CWE)CWE-362read 2026-10-23
FIRST EPSSEPSS score0.7 %2026-10-23
OSVaffected packages—

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published: 2026-08-19
Last Modified: 2026-09-09
NVD status: Deferred

Frequently asked questions

What is CVE-2026-45742?

Is CVE-2026-45742 actively exploited?

A proof-of-concept exploit exists for CVE-2026-45742, but active exploitation has not been confirmed at this time.

What is the CVSS score for CVE-2026-45742?

CVE-2026-45742 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

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