---
id: "CVE-2026-76802"
kind: "vulnerability"
aliases: ["CVE-2026-76802", "GHSA-jpf4-98qj-qr67", "GO-2026-6570"]
title: "Nuclei: Arbitrary Command Execution via DAST Code Signature Bypass in github.com/projectdiscovery/nuclei"
severity: "medium"
cvss: 4.7
epss: 0.00181
exploited: false
status: "open"
category: "package"
products: [{"name": "github.com/projectdiscovery/nuclei", "fixed": [], "affected": "all versions", "ecosystem": "go"}, {"name": "github.com/projectdiscovery/nuclei/v2", "fixed": [], "affected": "all versions", "ecosystem": "go"}, {"name": "github.com/projectdiscovery/nuclei/v3", "fixed": ["3.10.0"], "affected": ">= 3.0.0, < 3.10.0", "ecosystem": "go"}]
ecosystems: ["go"]
tags: ["ci-pipelines", "go", "nuclei", "package", "sdk-integrators", "security-scanning"]
not_affected_if: ["dast-disabled", "default-config", "only-trusted-templates", "version-3.10.0-or-later"]
published_at: "2026-09-22T17:17:24+00:00"
first_seen_at: "2026-10-23T19:13:08+00:00"
updated_at: "2026-10-23T21:49:10+00:00"
sources: [{"source": "govuln", "url": "https://pkg.go.dev/vuln/GO-2026-6570", "first_seen_at": "2026-10-23T19:13:08+00:00"}, {"source": "epss", "url": "https://api.first.org/data/v1/epss?cve=CVE-2026-76802", "first_seen_at": "2026-10-23T19:13:43+00:00"}, {"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-76802", "first_seen_at": "2026-10-23T19:35:23+00:00"}]
---

# Nuclei: Arbitrary Command Execution via DAST Code Signature Bypass in github.com/projectdiscovery/nuclei

Nuclei, a Go vulnerability scanner, skips its unsigned code-template signature check when DAST is enabled and loads a template that contains a fuzzing block with an unsigned code block. An attacker who can supply a template can run arbitrary shell commands on the host running the scan.

_Summary, check and fix written by a model from the sources; labelled as such._

## Affected

- go:github.com/projectdiscovery/nuclei affected all versions fixed ?
- go:github.com/projectdiscovery/nuclei/v2 affected all versions fixed ?
- go:github.com/projectdiscovery/nuclei/v3 affected >= 3.0.0, < 3.10.0 fixed 3.10.0

## How to check

Check go.mod for github.com/projectdiscovery/nuclei/v3 with a version from 3.0.0 up to but not including 3.10.0. Check whether scans run with -dast and accept templates from untrusted sources.

## Fix

Upgrade github.com/projectdiscovery/nuclei/v3 to 3.10.0 or later. Fixed versions for the unversioned and v2 module paths are unknown.

## Timeline

- 2026-10-23T19:13:08+00:00 govuln https://pkg.go.dev/vuln/GO-2026-6570
- 2026-10-23T19:13:43+00:00 epss https://api.first.org/data/v1/epss?cve=CVE-2026-76802
- 2026-10-23T19:35:23+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-76802

## From the sources

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.

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_