{"id":"CVE-2026-76805","revision":"85b8f190cb674c31bdec6c731e7d7c2b","records":[{"revision":"85b8f190cb674c31bdec6c731e7d7c2b","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-76805","aliases":[],"title":"Nuclei: Environment Variable Disclosure via Response-Derived Data in DAST/Fuzz Mode","description":"Nuclei is a vulnerability scanner built on a simple YAML-based DSL. From 3.0.0 until 3.10.0, the DAST/fuzz payload path in pkg/fuzz/parts.go can evaluate substituted runtime data more than once, creating a second evaluation pass that allows response content captured by an internal: true extractor in one protocol step to be reinterpreted as template syntax in a later fuzz step. This vulnerability is an incomplete fix for CVE-2026-41645: the prior remediation made expressions.Evaluate() single-pass within one call but did not prevent DAST/fuzz callers from evaluating substituted output again. When -env-vars is enabled, a malicious scan target can return marker-shaped content that resolves against the template variable map and discloses scanner-host environment variables such as credentials, API keys, or tokens. The vulnerability requires a multi-step DAST or fuzz template, response data reused through an internal extractor, and explicit environment-variable expansion; users who do not enable -env-vars are not affected by the sensitive-information disclosure. This issue is fixed in version 3.10.0.","state":0,"publishedAt":"2026-09-22T16:48:49.791+00:00","modifiedAt":"2026-09-22T18:19:16.72+00:00","affected":[{"ecosystem":"Vendor product","name":"nuclei","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"projectdiscovery\",\n                    \"product\": \"nuclei\",\n                    \"versions\": [\n                        {\n                            \"version\": \">= 3.0.0, < 3.10.0\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N","score":5.3,"severity":"MEDIUM"}],"references":["https://github.com/projectdiscovery/nuclei/security/advisories/GHSA-jpvm-9frm-hjcq","https://github.com/projectdiscovery/nuclei/pull/7499","https://github.com/projectdiscovery/nuclei/commit/ccbfb12bd01447ba25f6e755dfb2bee677736da6","https://github.com/projectdiscovery/nuclei/releases/tag/v3.10.0"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-76805","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-76805","identifiers":["CVE-2026-76805"]},"retained":false,"historicalAffected":[]}],"coverage":[]}