🛡️ CVE-2026-41645 — nuclei

🟡 CVSS 5.3 — Medium ✅ No Known Exploit CWE-94 NVD
5.3
CVSS Score
0 Low4 Medium7 High9 Critical10

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.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is high, an attacker needs no privileges on the target. A user must be tricked into taking some action. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity none, availability none.

Weakness class

CVE-2026-41645 is classified as CWE-94: Code Injection. Input is incorporated into code that the runtime evaluates, so an attacker can have their own code executed.

Affected software

CVE-2026-41645 is recorded against 2 packages.

  • github.com/projectdiscovery/nuclei/v3
  • nuclei (from 3.0.0 up to 3.8.0)

Timeline and source

Published on 22 April 2026 and last revised on 11 May 2026. No public exploit is currently recorded for this entry. A vendor advisory or fix has been published. Record sourced from NVD.

References

github.com (Web)
nvd.nist.gov (Advisory)
github.com (Web)
github.com (Web)
github.com (Web)
github.com (Web)
github.com (Package)
github.com (Web)

Details

Severity Medium
CVSS Score 5.3
CVSS Vector CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N
CWE CWE-94
Public Exploit ✅ No
Source NVD
Published 2026-04-22
Updated 2026-08-11
Modified 2026-05-11

Affected Packages

Software From version Fixed in
github.com/projectdiscovery/nuclei/v3
nuclei 3.0.0 3.8.0

Similar Threats

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