Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
Nuclei (github.com/projectdiscovery/nuclei/v3) versions 3.0.0 before 3.8.0 are vulnerable. A malicious target server can return response data containing DSL expressions that multi-step templates reuse, and when the -env-vars (-ev) option is explicitly enabled, this can expose host environment variables such as API keys and tokens. Upgrade to Nuclei v3.8.0, or leave -ev disabled when scanning untrusted targets, since the option is off by default.
Not analysed yet
We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.
Severity and exploitation
| Score | Rating | CVSS | Vector | Source |
|---|---|---|---|---|
| 4.0 | Medium | 3.1 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:N/A:N | CNA (mitre) |
- CISA KEV Not listed.
- EPSS 0.0035, the 29th percentile, on 14 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Oct 2026, 15:05 UTC First seen by agentprime
- 31 Oct 2026, 15:05 UTC Confirmed by OSV
Sources
- GitHub Advisory Database: GHSA-jm34-66cf-qpvr
- OSV: GHSA-jm34-66cf-qpvr
- github.com/projectdiscovery/nuclei/security/advisories/GHSA-jm34-66cf-qpvr
- nvd.nist.gov/vuln/detail/CVE-2026-41645
- github.com/projectdiscovery/nuclei/pull/7221
- github.com/projectdiscovery/nuclei/pull/7321
- github.com/projectdiscovery/nuclei/commit/6c803c74d193f85f8a6d9803ce493fd302cad0eb
- github.com/projectdiscovery/nuclei/commit/d2217320162d5782ca7cb95bef9dda17063818f3
- github.com/projectdiscovery/nuclei
- github.com/projectdiscovery/nuclei/releases/tag/v3.8.0