CVE-2026-41645
Nuclei is a vulnerability scanner built on a simple YAML-based DSL.
Does this matter?
Lower severity and a low EPSS score (0.34%). Track it; it rarely justifies an emergency change on its own.
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
- 5.3 MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N
- EPSS
- 0.34% probability · 28th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-94
- Affected
- projectdiscovery/nuclei
- Source
- security-advisories@github.com
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
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.