{"id":"CVE-2026-76805","published":"2026-09-22T17:17:25.087","lastModified":"2026-09-23T18:28:25.093","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.","cvssScore":5.3,"cvssSeverity":"MEDIUM","cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N","cwes":["CWE-200"],"vendors":[],"products":[],"references":[{"url":"https://github.com/projectdiscovery/nuclei/commit/ccbfb12bd01447ba25f6e755dfb2bee677736da6","tags":[]},{"url":"https://github.com/projectdiscovery/nuclei/pull/7499","tags":[]},{"url":"https://github.com/projectdiscovery/nuclei/releases/tag/v3.10.0","tags":[]},{"url":"https://github.com/projectdiscovery/nuclei/security/advisories/GHSA-jpvm-9frm-hjcq","tags":[]}],"exploitRefs":[{"url":"https://github.com/projectdiscovery/nuclei/commit/ccbfb12bd01447ba25f6e755dfb2bee677736da6","tags":[]},{"url":"https://github.com/projectdiscovery/nuclei/pull/7499","tags":[]},{"url":"https://github.com/projectdiscovery/nuclei/releases/tag/v3.10.0","tags":[]},{"url":"https://github.com/projectdiscovery/nuclei/security/advisories/GHSA-jpvm-9frm-hjcq","tags":[]}],"hasPoc":true,"ai":null}