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TI-2026-30874 Aliases CVE-2026-42594GHSA-r33j-c622-r6qp

Gotenberg: Unauthenticated denial of service via echo.Context pool reuse in webhook async goroutine

Priority HIGH 72CWE-362Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00348 28th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed gotenberg (gotenberg): 8.32.0github.com/gotenberg/gotenberg/v8 (Go): 8.32.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
gotenberggotenbergbefore 8.32.08.32.0Patch availableCNA
—github.com/gotenberg/gotenberg/v8 (Go)before 8.32.08.32.0Patch availableGHSA-r33j-c622-r6qp
  • gotenberg Vendorgotenberg Affected before 8.32.0 Fixed in 8.32.0 Patch available CNA
  • github.com/gotenberg/gotenberg/v8 (Go) Vendor— Affected before 8.32.0 Fixed in 8.32.0 Patch available GHSA-r33j-c622-r6qp

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:thecodingmachine:gotenberg:*:*:*:*:*:*:*:*before 8.32.0Vulnerablegotenberg
  • cpe:2.3:a:thecodingmachine:gotenberg:*:*:*:*:*:*:*:* Versions before 8.32.0 Vulnerable ·gotenberg

Remediation

  • Fix · CNA gotenberg (gotenberg) Fixed in 8.32.0
  • Fix · GHSA-r33j-c622-r6qp github.com/gotenberg/gotenberg/v8 (Go) Fixed in 8.32.0 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-42594
  2. 2026-10-03 Alias added: GHSA-r33j-c622-r6qp

References

Exploit 1

Advisory 1

Other 1

  • TI-2026-30869 Gotenberg: Unauthenticated RCE via ExifTool Metadata Key Injection CVSS 3.1CRITICAL 9.8
  • TI-2026-29063 Gotenberg vulnerable to argument injection via newlines in ExifTool metadata values CVSS 3.1CRITICAL 10.0
  • TI-2026-30876 Gotenberg: Unauthenticated SSRF via default deny-list bypass in downloadFrom and webhook CVSS 3.1CRITICAL 9.4
  • TI-2026-27588 Gotenberg has a ReDoS via extraHttpHeaders scope feature CVSS 4.0HIGH 8.7
  • TI-2026-30875 Gotenberg: Server-Side Request Forgery via Chromium URL Endpoint with Redirect-Based Deny-List Bypass CVSS 3.1HIGH 8.6
  • TI-2026-30871 Gotenberg: Server-Side Request Forgery (SSRF) in github.com/gotenberg/gotenberg/v8 CVSS 3.1HIGH 8.2
See all 21 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences