ProjectDiscovery Nuclei up to 3.9.x DAST Template Loading code injection

Summaryinfo

A vulnerability, which was classified as problematic, has been found in ProjectDiscovery Nuclei up to 3.9.x. The affected element is an unknown function of the component DAST Template Loading. This manipulation causes code injection. This vulnerability is registered as CVE-2026-76802. Remote exploitation of the attack is possible. No exploit is available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in ProjectDiscovery Nuclei up to 3.9.x. It has been declared as problematic. Affected by this vulnerability is an unknown functionality of the component DAST Template Loading. The manipulation 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 integrity. The summary by CVE is:

Nuclei is a vulnerability scanner built on a simple YAML-based DSL. From 3.0.0 until 3.10.0, the DAST template loading branch does not apply the unsigned code-template signature check before accepting a template that contains both a fuzzing: block and an unsigned code: block. When an operator enables -dast, an untrusted multiprotocol template can place an unsigned code request into the execution queue and run arbitrary shell commands even without -code or a valid cryptographic signature. The issue affects CLI DAST scans and SDK integrations that enable DAST while accepting attacker-supplied templates. This issue is fixed in version 3.10.0.

It is possible to read the advisory at github.com. This vulnerability is known as CVE-2026-76802 since 08/19/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation requires an enhanced level of successful authentication. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1059 according to MITRE ATT&CK.

Upgrading to version 3.10.0 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
• 3.8
• 3.9

Website

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

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