Promzard up to 4.0.0 Template Loading vm.runInThisContext ctx code injection

Summaryinfo

A vulnerability identified as critical has been detected in Promzard up to 4.0.0. Affected by this vulnerability is the function vm.runInThisContext of the component Template Loading. The manipulation of the argument ctx leads to code injection. This vulnerability is listed as CVE-2026-127109. The attack may be initiated remotely. There is no available exploit.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Promzard up to 4.0.0. This issue affects the function vm.runInThisContext of the component Template Loading. The manipulation of the argument ctx with an unknown input leads to a code injection vulnerability. Using CWE to declare the problem leads to 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. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

A code injection vulnerability in promzard’s template-loading functionality allows an attacker who can control property names in the context object (ctx) to execute arbitrary code with the privileges of the Node.js process. The library inserts context property names into a generated function’s parameter list without validation or escaping and evaluates the resulting source using `vm.runInThisContext()`. A crafted property name can escape the parameter list and inject JavaScript code, even when the template file is fully trusted.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-127109 since 11/12/2026. The exploitation is known to be easy. The attack may be initiated remotely. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 11/12/2026). The attack technique deployed by this issue is T1059 according to MITRE ATT&CK.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Name

• Promzard

Version

• 4.0

CPE 2.3info

• 🔒

CPE 2.2info

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