CVE-2026-42594: high-severity vulnerability in gotenberg
Gotenberg: Unauthenticated denial of service via echo.Context pool reuse in webhook async goroutine
Published · Updated
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 0.3%
Gotenberg is a Docker-powered stateless API for PDF files. Prior to 8.32.0, the webhook middleware spawns a goroutine that holds a reference to the request's echo.Context after the synchronous handler returns ErrAsyncProcess and Echo recycles the context back to its sync.Pool. When a concurrent request claims the recycled context, c.Reset() clears the store. If the webhook goroutine reaches hardTimeoutMiddleware at that moment, an unchecked type assertion on a nil store entry panics outside any recover() scope, crashing the Gotenberg process. Any anonymous caller reaches the webhook path (default webhook-deny-list filters only the webhook destination, not the submitter). A single-source stress of ~24 webhook requests plus ~60 GET /version requests crashes the process in about two seconds. This vulnerability is fixed in 8.32.0.
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%