Is this vulnerability remotely exploitable?

Yes, if the Gotenberg API is exposed to untrusted clients and accepts user-controlled URLs, an attacker can exploit this vulnerability remotely by crafting URLs with mixed-case or uppercase schemes.

What level of access does an attacker need to exploit this issue?

The attacker must be able to submit requests to the affected Gotenberg endpoint that include or influence the URL used for document retrieval or conversion. No direct access to internal networks is required; the vulnerability abuses Gotenberg's own network access.

What is the safest general fix pattern for this class of vulnerabilities?

Normalize and strictly validate URL schemes and destinations before use, apply allowlist-based restrictions on both schemes and hosts, and centralize outbound request logic so that all such calls pass through well-reviewed validation and policy checks.

Severity:

HIGH RISK

(7.5)

Server-Side Request Forgery via Case-Insensitive URL Schemes (CWE-918) in Gotenberg Document Conversion API

CVE-2026-27018

Published:

Mar 30, 2026

Status:

Analyzed

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

NDV

Recent Vulnerabilities

CWE-77;CWE-78

CRITICAL RISK

CRITICAL

(9.8)

OS Command Injection (CWE-78) in Totolink A7100RU CGI Handler setAccessDeviceCfg

Remote Code Execution on the Router

April 12, 2026

CWE-77;CWE-78

CRITICAL RISK

CRITICAL

(9.8)

OS Command Injection (CWE-78) in Totolink A7100RU CGI setLedCfg Handler

Remote Code Execution on the Router

April 12, 2026

Vulnerability Type

Category:

Server-Side Request Forgery (SSRF)

CWE:

CWE-22;CWE-918

Impact:

Server-Side Request Forgery with Potential Internal Network Access

Severity:

HIGH RISK

(7.5)

CVSS Version:

3.1

Vulnerability Type

Category:

Server-Side Request Forgery (SSRF)

CWE:

CWE-22;CWE-918

Impact:

Server-Side Request Forgery with Potential Internal Network Access

Severity:

HIGH RISK

(7.5)

CVSS Version:

3.1

Catch This CVE While Code Is Being Written

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Ask AI for summary of CodeAnt

Server-Side Request Forgery via Case-Insensitive URL Schemes (CWE-918) in Gotenberg Document Conversion API

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

Recent Vulnerabilities

CRITICAL RISK

CRITICAL

(9.8)

OS Command Injection (CWE-78) in Totolink A7100RU CGI Handler setAccessDeviceCfg

CRITICAL RISK

CRITICAL

(9.8)

OS Command Injection (CWE-78) in Totolink A7100RU CGI setLedCfg Handler

Vulnerability Type

Vulnerability Type

Vulnerability Type

Catch This CVE While Code Is Being Written

Ship clean & secure code faster

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