CVE-2026-76802 Nuclei: Arbitrary Command Execution via DAST Code Signature Bypass
Attackers can execute arbitrary shell commands by supplying malicious templates when DAST mode is enabled, bypassing signature checks.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-76802?
CVE-2026-76802 is a medium-severity command injection vulnerability in projectdiscovery nuclei, published on 22 Sep 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official 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.
Weakness: CWE-78
Which versions are affected by CVE-2026-76802?
5 open source packages ship an affected version, including github.com/projectdiscovery/nuclei/v3, github.com/projectdiscovery/nuclei and github.com/projectdiscovery/nuclei/v2.
| Package | Affected | Fixed in |
|---|---|---|
github.com/projectdiscovery/nuclei/v3 Go | From 3.0.0 | 3.10.0 |
github.com/projectdiscovery/nuclei/v3 Go | From 3.0.0 | 3.10.0 |
github.com/projectdiscovery/nuclei/v3 Go | From 3.0.0 | 3.10.0 |
github.com/projectdiscovery/nuclei Go | All versions | None |
github.com/projectdiscovery/nuclei/v2 Go | All versions | None |
How do I fix CVE-2026-76802?
Upgrade github.com/projectdiscovery/nuclei/v3 to 3.10.0 or later.
Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.
Is CVE-2026-76802 being exploited?
There is no known exploitation of CVE-2026-76802 in the wild and no public exploit code.
Sources
Also known as GHSA-jpf4-98qj-qr67, GO-2026-6570.