Nuclei: Environment variable disclosure via Response-Derived DSL Expressions_CVE-2026-41645

5.3 / 10

MEDIUM

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N

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.

Basic Information

ID CVE-2026-41645

Source GitHub_M

Published May 8, 2026 at 03:17

Affected Product

Vendor projectdiscovery

Product nuclei

Version >= 3.0.0, < 3.8.0

Affected Versions projectdiscovery nuclei >= 3.0.0, < 3.8.0

CWE Classification

CWE-94

References

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    "published": "2026-05-08T03:17:19.302Z",
    "modified": "2026-05-08T03:17:19.302Z",
    "type": "cve",
    "title": "Nuclei: Environment variable disclosure via Response-Derived DSL Expressions",
    "source": "GitHub_M",
    "references": "https://github.com/projectdiscovery/nuclei/security/advisories/GHSA-jm34-66cf-qpvr\nhttps://github.com/projectdiscovery/nuclei/pull/7221\nhttps://github.com/projectdiscovery/nuclei/pull/7321\nhttps://github.com/projectdiscovery/nuclei/commit/6c803c74d193f85f8a6d9803ce493fd302cad0eb\nhttps://github.com/projectdiscovery/nuclei/commit/d2217320162d5782ca7cb95bef9dda17063818f3\nhttps://github.com/projectdiscovery/nuclei/releases/tag/v3.8.0",
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