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TI-2026-29063 Aliases CVE-2026-40281GHSA-q7r4-hc83-hf2q

Gotenberg vulnerable to argument injection via newlines in ExifTool metadata values

Priority HIGH 82CWE-88Published · Updated

Key facts

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

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-88.

Summary

Gotenberg is a Docker-powered stateless API for PDF files. In versions 8.30.1 and earlier, the metadata write endpoint validates metadata keys for control characters but leaves metadata values unsanitized. A newline character in a metadata value splits the ExifTool stdin line into two separate arguments, allowing injection of arbitrary ExifTool pseudo-tags such as -FileName, -Directory, -SymLink, and -HardLink. This is a bypass of the incomplete key-sanitization fix introduced in v8.30.1. An unauthenticated attacker can rename or move any PDF being processed to an arbitrary path in the container filesystem, overwrite arbitrary files, or create symlinks and hard links at arbitrary paths.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.02258 83rd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed github.com/gotenberg/gotenberg/v8 (Go): 8.31.0

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
gotenberggotenbergup to 8.30.1—No fix listedCNA
—github.com/gotenberg/gotenberg/v8 (Go)before 8.31.08.31.0Patch availableGHSA-q7r4-hc83-hf2q
  • gotenberg Vendorgotenberg Affected up to 8.30.1 Fixed in — No fix listed CNA
  • github.com/gotenberg/gotenberg/v8 (Go) Vendor— Affected before 8.31.0 Fixed in 8.31.0 Patch available GHSA-q7r4-hc83-hf2q

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:thecodingmachine:gotenberg:*:*:*:*:*:*:*:*before 8.31.0Vulnerablegotenberg
  • cpe:2.3:a:thecodingmachine:gotenberg:*:*:*:*:*:*:*:* Versions before 8.31.0 Vulnerable ·gotenberg

Remediation

  • Fix · GHSA-q7r4-hc83-hf2q github.com/gotenberg/gotenberg/v8 (Go) Fixed in 8.31.0 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-40281
  2. 2026-10-03 Alias added: GHSA-q7r4-hc83-hf2q

References

Exploit 1

Patch 1

Advisory 1

Other 2

  • TI-2026-30869 Gotenberg: Unauthenticated RCE via ExifTool Metadata Key Injection CVSS 3.1CRITICAL 9.8
  • 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
  • TI-2026-30870 Gotenberg: ExifTool group-prefix syntax bypasses dangerous-tag blocklist 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