Description
Nuclei is a vulnerability scanner built on a simple YAML-based DSL. From version 3.0.0 to before version 3.8.0, a vulnerability in Nuclei's expression evaluation engine makes it possible for a malicious target server to inject and execute supported DSL expressions. This happens when HTTP response data containing helper/function syntax gets reused by multi-step templates. If the -env-vars / -ev option is explicitly enabled, this can expose host environment variables. That option is off by default, so standard configurations are not affected by the information disclosure risk. This issue has been patched in version 3.8.0.
Published: 2026-05-08
Score: 5.3 Medium
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-jm34-66cf-qpvr Nuclei: Environment variable disclosure via Response-Derived DSL Expressions
History

Mon, 11 May 2026 19:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Fri, 08 May 2026 19:45:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:a:projectdiscovery:nuclei:*:*:*:*:*:go:*:*

Fri, 08 May 2026 05:45:00 +0000

Type Values Removed Values Added
First Time appeared Projectdiscovery
Projectdiscovery nuclei
Vendors & Products Projectdiscovery
Projectdiscovery nuclei

Fri, 08 May 2026 04:00:00 +0000

Type Values Removed Values Added
Description Nuclei is a vulnerability scanner built on a simple YAML-based DSL. From version 3.0.0 to before version 3.8.0, a vulnerability in Nuclei's expression evaluation engine makes it possible for a malicious target server to inject and execute supported DSL expressions. This happens when HTTP response data containing helper/function syntax gets reused by multi-step templates. If the -env-vars / -ev option is explicitly enabled, this can expose host environment variables. That option is off by default, so standard configurations are not affected by the information disclosure risk. This issue has been patched in version 3.8.0.
Title Nuclei: Environment variable disclosure via Response-Derived DSL Expressions
Weaknesses CWE-94
References
Metrics cvssV3_1

{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N'}


Subscriptions

Projectdiscovery Nuclei
cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-05-11T18:16:02.582Z

Reserved: 2026-04-21T23:58:43.802Z

Link: CVE-2026-41645

cve-icon Vulnrichment

Updated: 2026-05-11T18:15:47.931Z

cve-icon NVD

Status : Analyzed

Published: 2026-05-08T04:16:18.177

Modified: 2026-05-08T19:42:49.960

Link: CVE-2026-41645

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-05-08T05:30:46Z

Weaknesses