CVE-2026-41645

Name: CVE-2026-41645
Creator: NVD / NIST
Published: 2026-05-08T04:16:18.177+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.3/10EPSS 0.34%

Last modified Jun 17, 2026

CVE-2026-41645 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. 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. EPSS estimates a 0.34% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

5.3/10

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

EPSS Probability

0.34%

26.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-94

Affected Software

Vendor	Product	Versions
Projectdiscovery	Nuclei	>= 3.0.0, < 3.8.0

References

https://github.com/projectdiscovery/nuclei/commit/6c803c74d193f85f8a6d9803ce493fd302cad0ebPatch
https://github.com/projectdiscovery/nuclei/commit/d2217320162d5782ca7cb95bef9dda17063818f3Patch
https://github.com/projectdiscovery/nuclei/pull/7221Issue Tracking, Patch
https://github.com/projectdiscovery/nuclei/pull/7321Issue Tracking, Patch
https://github.com/projectdiscovery/nuclei/releases/tag/v3.8.0Product, Release Notes
https://github.com/projectdiscovery/nuclei/security/advisories/GHSA-jm34-66cf-qpvrMitigation, Patch, Vendor Advisory

Timeline

Published: May 8, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-41645?

How severe is CVE-2026-41645?

CVE-2026-41645 has a CVSS score of 5.3/10 (MEDIUM severity). The EPSS model estimates a 0.34% probability of exploitation in the next 30 days.

How do I fix CVE-2026-41645?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-41645?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST