Bug 2538855 (CVE-2026-76804)

Summary: CVE-2026-76804 github.com/projectdiscovery/nuclei: Nuclei: Local File Read via Workflow File-Protocol Gate 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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Hardware: All   
OS: Linux   
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A flaw was found in Nuclei, a vulnerability scanner. An untrusted workflow, which is a set of instructions for the scanner, could bypass a security control designed to restrict file access. This bypass allows the workflow to load templates that read local files from the scanner host, even when file access is explicitly disabled by the operator. This could lead to sensitive information disclosure from the system running Nuclei.
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Description OSIDB Bzimport 2026-09-22 20:56:25 UTC 
Nuclei is a vulnerability scanner built on a simple YAML-based DSL. From 3.0.0 until 3.10.0, the workflow template loading path does not enforce the -file capability gate when resolving file: protocol templates referenced by a workflow. An untrusted unsigned workflow can therefore load a file-protocol template and read local files from the scanner host even when the operator has not enabled file templates. The issue affects CLI users running workflows with -w and SDK integrations that accept end-user workflows while relying on the default file-access restriction. This issue is fixed in version 3.10.0.