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Vulnerability record · CVE-2026-41645 · published 8 May 2026

CVE-2026-41645: Projectdiscovery nuclei code injection vulnerability

Projectdiscovery · Nuclei

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.

5.3 CVSS 3.1 Medium EPSS 0.44% · top 63.9% CWE-94 · Code injection
5.3CVSS 3.1 base score
0.44%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
6References
17 Jun 2026Last modified by NVD

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.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/projectdiscovery/nuclei/commit/6c803c74d193f85f8a6d9803ce493fd302cad0eb Patch
https://github.com/projectdiscovery/nuclei/commit/d2217320162d5782ca7cb95bef9dda17063818f3 Patch
https://github.com/projectdiscovery/nuclei/pull/7221 Issue TrackingPatch
https://github.com/projectdiscovery/nuclei/pull/7321 Issue TrackingPatch
https://github.com/projectdiscovery/nuclei/releases/tag/v3.8.0 ProductRelease Notes
https://github.com/projectdiscovery/nuclei/security/advisories/GHSA-jm34-66cf-qpvr MitigationPatchVendor Advisory

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Source: NIST National Vulnerability Database (record CVE-2026-41645), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.