CVE-2026-41645
Nuclei: Environment variable disclosure via Response-Derived DSL Expressions
- Published
- Updated
- Reserved
- Assigned by
- GitHub_M
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.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| GitHub_MCNA (assigner) | 3.1 | Medium5.3 | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N |
| NVDNVD · Analyzed | 3.1 | Medium5.3 | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N |
- EPSS (exploitation in 30 days)
- 0.35% · top 71% of all CVEs (6 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.3.
Weakness
Affected products
- affected >= 3.0.0, < 3.8.0
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- Gogithub.com/projectdiscovery/nuclei/v3GHSA-jm34-66cf-qpvr (opens in a new tab)
References (6)
- https://github.com/projectdiscovery/nuclei/security/advisories/GHSA-jm34-66cf-qpvr (opens in a new tab)x_refsource_CONFIRM
- https://github.com/projectdiscovery/nuclei/pull/7221 (opens in a new tab)x_refsource_MISC
- https://github.com/projectdiscovery/nuclei/pull/7321 (opens in a new tab)x_refsource_MISC
- https://github.com/projectdiscovery/nuclei/commit/6c803c74d193f85f8a6d9803ce493fd302cad0eb (opens in a new tab)x_refsource_MISC
- https://github.com/projectdiscovery/nuclei/commit/d2217320162d5782ca7cb95bef9dda17063818f3 (opens in a new tab)x_refsource_MISC
- https://github.com/projectdiscovery/nuclei/releases/tag/v3.8.0 (opens in a new tab)x_refsource_MISC
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-jm34-66cf-qpvr (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2026-41645)Record last updated .