Bug 2538879 (CVE-2026-76802)

Summary: CVE-2026-76802 github.com/projectdiscovery/nuclei: Nuclei: Arbitrary Command Execution via DAST Code Signature Bypass
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
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Priority: medium    
Version: unspecifiedKeywords: Security
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OS: Linux   
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A flaw was found in Nuclei, a vulnerability scanner. The Dynamic Application Security Testing (DAST) template loading process fails to enforce signature checks for code templates. This allows an attacker to craft a malicious template containing unsigned code, which, when processed by an operator enabling DAST, can lead to the execution of arbitrary shell commands.
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Description OSIDB Bzimport 2026-09-22 21:02:55 UTC 
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.