CVE-2026-45742: high-severity vulnerability in gotenberg
Gotenberg: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
Published
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.5epss 0.7%
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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected products
gotenberg · gotenbergRelated CVEs — gotenberg
In the same product, most dangerous first.
CVE-2026-42589CRITICALGotenberg: Unauthenticated RCE via ExifTool Metadata Key InjectionEPSS 3.0%CVE-2026-40281CRITICALGotenberg vulnerable to argument injection via newlines in ExifTool metadata valuesEPSS 2.3%CVE-2026-40280HIGHGotenberg SSRF via case-insensitive URL scheme bypass in webhook and downloadFrom deny-listsEPSS 1.9%CVE-2026-27018HIGHGotenberg: Chromium deny-list bypass via case-insensitive URL schemeEPSS 1.7%CVE-2026-42596CRITICALGotenberg: Unauthenticated SSRF via default deny-list bypass in downloadFrom and webhookEPSS 1.6%CVE-2026-55229HIGHGotenberg: SSRF via LibreOffice document processingEPSS 1.5%