ProjectDiscovery Nuclei up to 3.7.x code injection

Summaryinfo

A vulnerability labeled as critical has been found in ProjectDiscovery Nuclei up to 3.7.x. The affected element is an unknown function. Such manipulation leads to code injection. This vulnerability is traded as CVE-2026-41645. The attack may be launched remotely. There is no exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in ProjectDiscovery Nuclei up to 3.7.x and classified as problematic. Affected by this issue is an unknown part. The manipulation 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. CVE summarizes:

Nuclei is a vulnerability scanner built on a simple YAML-based DSL. From version 3.0.0 to before version 3.8.0, a vulnerability in Nuclei's expression evaluation engine makes it possible for a malicious target server to inject and execute supported DSL expressions. This happens when HTTP response data containing helper/function syntax gets reused by multi-step templates. If the -env-vars / -ev option is explicitly enabled, this can expose host environment variables. That option is off by default, so standard configurations are not affected by the information disclosure risk. This issue has been patched in version 3.8.0.

The advisory is available at github.com. This vulnerability is handled as CVE-2026-41645 since 04/22/2026. The exploitation is known to be difficult. The attack may be launched remotely. No form of authentication is required for exploitation. Successful exploitation requires user interaction by the victim. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1059 by the MITRE ATT&CK project.

Upgrading to version 3.8.0 eliminates this vulnerability.

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Productinfo

Type

• Project Management Software

Vendor

• ProjectDiscovery

Name

• Nuclei

Version

• 3.0
• 3.1
• 3.2
• 3.3
• 3.4
• 3.5
• 3.6
• 3.7

Website

• Product: https://github.com/projectdiscovery/nuclei/

CPE 2.3info

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CPE 2.2info

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