Oapi-codegen up to 2.8.0 Server-urls Template servers[].x-go-name code injection

Summaryinfo

A vulnerability was found in Oapi-codegen up to 2.8.0. It has been classified as critical. This issue affects some unknown processing of the component Server-urls Template. This manipulation of the argument servers[].x-go-name causes code injection. This vulnerability is tracked as CVE-2026-119027. The attack is possible to be carried out remotely. No exploit exists. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability has been found in Oapi-codegen up to 2.8.0 and classified as critical. Affected by this vulnerability is an unknown code block of the component Server-urls Template. The manipulation of the argument servers[].x-go-name with an unknown input leads to a code injection vulnerability. The CWE definition for the vulnerability is CWE-94. The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

oapi-codegen 2.5.0 before 2.8.1 contains a code injection vulnerability that allows attackers to inject Go code by supplying a crafted servers[].x-go-name value emitted unescaped by the server-urls template. Attackers who control an OpenAPI document can define an injected func init() that executes when the victim builds and imports the generated package.

The advisory is shared at github.com. This vulnerability is known as CVE-2026-119027 since 10/29/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. It demands that the victim is doing some kind of user interaction. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1059 for this issue.

Upgrading to version 2.8.1 eliminates this vulnerability.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Name

• Oapi-codegen

Version

• 2.0
• 2.1
• 2.2
• 2.3
• 2.4
• 2.5
• 2.6
• 2.7
• 2.8.0

Website

• Product: https://github.com/oapi-codegen/oapi-codegen/

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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