{"id":"GHSA-jpvm-9frm-hjcq","revision":null,"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":[]},{"revision":"c8e80403439648ebaa5b468672f81afa","observedAt":"2026-11-11T16:07:49.714+00:00","statement":{"source":"euvd","id":"EUVD-2026-84557","aliases":["CVE-2026-76805","GHSA-jpvm-9frm-hjcq"],"title":"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…","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":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD 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":null}],"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://euvd.enisa.europa.eu/vulnerability/EUVD-2026-84557","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"Sep 22, 2026, 4:48:49 PM","dateUpdated":"Sep 22, 2026, 6:19:16 PM"},"relatedAdvisories":[],"note":"EUVD source date text has no stated timezone and is retained without inventing a UTC instant. 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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":"2026-09-22T17:17:25.087+00:00","modifiedAt":"2026-09-23T18:28:25.093+00:00","affected":[],"metrics":[{"system":"CVSS 3.1 · security-advisories@github.com · Secondary","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/commit/ccbfb12bd01447ba25f6e755dfb2bee677736da6","https://github.com/projectdiscovery/nuclei/pull/7499","https://github.com/projectdiscovery/nuclei/releases/tag/v3.10.0","https://github.com/projectdiscovery/nuclei/security/advisories/GHSA-jpvm-9frm-hjcq"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-76805","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Awaiting Analysis","weaknesses":["CWE-200"],"productCriteria":[],"sourceDates":{"published":"2026-09-22T17:17:25.087","lastModified":"2026-09-23T18:28:25.093"},"relatedAdvisories":[],"note":"NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON."},"key":"nvd:CVE-2026-76805","identifiers":["CVE-2026-76805"]},"retained":false,"historicalAffected":[]},{"revision":"0fb7b66104204f67ac2233b17fb37f06","observedAt":"2026-10-24T13:19:41.952+00:00","statement":{"source":"osv","id":"GHSA-jpvm-9frm-hjcq","aliases":["CVE-2026-76805","GO-2026-6571"],"title":"Nuclei: Environment Variable Disclosure via Response-Derived Data in DAST/Fuzz Mode","description":"A vulnerability in Nuclei's DAST/fuzz expression evaluation path allows a malicious target server to trigger disclosure of scanner-host environment variables when the `-env-vars` / `-ev` option is explicitly enabled.\n\nThis is an incomplete fix for [CVE-2026-41645](https://github.com/projectdiscovery/nuclei/security/advisories/GHSA-jm34-66cf-qpvr) / GHSA-jm34-66cf-qpvr. The original fix hardened `expressions.Evaluate()` to be single-pass within one call, but did not address callers that invoked evaluation multiple times on substituted output in the DAST/fuzz pipeline.\n\n**Affected Component**\n\nThe issue is in the DAST/fuzz payload evaluation path (`pkg/fuzz/parts.go`) and the shared template rendering boundary. When a multi-step template captures response data via an internal extractor and reuses it in a subsequent fuzz step, the fuzz evaluator could treat the substituted response content as fresh template syntax on a second evaluation pass.\n\n**Description**\n\nIn DAST/fuzz mode, payload evaluation previously ran expression substitution more than once on the same value. Response-derived content captured by an `internal: true` extractor in a prior protocol step could flow into a fuzz payload and be reinterpreted as DSL/helper syntax on a subsequent pass.\n\nWhen `-env-vars` (`-ev`) is enabled, environment variables are merged into the template variable map. A malicious target can return response data containing expressions like `{{env_var_name}}` which, when reused in a subsequent fuzz step, resolve to actual environment variable values. This can expose sensitive host data such as API keys, credentials, and tokens.\n\nWithout `-ev` enabled (the default), response-derived data may still cause other DSL helpers to run, but that behavior is not treated as a security issue and has no meaningful security impact beyond unexpected behavior.\n\n> [!NOTE]\nThe `-env-vars` / `-ev` option is off by default. Users who have not explicitly enabled it are not affected by this vulnerability.\n\n**Affected Users**\n\n- **CLI users** running `nuclei -dast` (or fuzzing) with multi-step templates that chain an internal extractor into a subsequent fuzz step against untrusted targets, with the `-ev` flag enabled.\n- **SDK users** who integrate Nuclei with the fuzz pipeline enabled, `EnvironmentVariables` set to `true`, and scan targets that are not fully trusted.\n\n**Patches**\n\n- The vulnerability is fixed in Nuclei v3.10.0. Upgrading is strongly recommended.\n- Fix reference: https://github.com/projectdiscovery/nuclei/pull/7499\n- Related original fix: https://github.com/projectdiscovery/nuclei/pull/7221, https://github.com/projectdiscovery/nuclei/pull/7321\n\n**Mitigation**\n\nUpgrade to Nuclei v3.10.0, where template-authored text is rendered once through a shared rendering boundary and runtime values from responses, extractors, and constants remain opaque data.\n\nIf you have `-ev` enabled, disable it when scanning untrusted targets to avoid environment variable disclosure.\n\n**Workarounds**\n\nIf upgrading is not an option, ensure `-env-vars` / `-ev` is not enabled when running DAST/fuzz scans with multi-step templates against untrusted targets.\n\n**Acknowledgments**\n\nThanks to @BerSecHub for reporting this issue.","state":0,"publishedAt":"2026-09-22T20:37:24+00:00","modifiedAt":"2026-10-01T20:55:51.6799782+00:00","affected":[{"ecosystem":"Go","name":"github.com/projectdiscovery/nuclei/v3","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"3.0.0"},{"kind":"fixed","version":"3.10.0"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V3","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"MODERATE"}],"references":["https://github.com/projectdiscovery/nuclei/security/advisories/GHSA-jpvm-9frm-hjcq","https://nvd.nist.gov/vuln/detail/CVE-2026-76805","https://github.com/projectdiscovery/nuclei/pull/7499","https://github.com/projectdiscovery/nuclei/commit/ccbfb12bd01447ba25f6e755dfb2bee677736da6","https://github.com/projectdiscovery/nuclei","https://github.com/projectdiscovery/nuclei/releases/tag/v3.10.0"],"sourceUrl":"https://github.com/advisories/GHSA-jpvm-9frm-hjcq","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-jpvm-9frm-hjcq","identifiers":["GHSA-jpvm-9frm-hjcq","CVE-2026-76805","GO-2026-6571"]},"retained":false,"historicalAffected":[]},{"revision":"6434f4d04032484193fe22e38dba3678","observedAt":"2026-10-24T13:19:41.952+00:00","statement":{"source":"osv","id":"GO-2026-6571","aliases":["CVE-2026-76805","GHSA-jpvm-9frm-hjcq"],"title":"Nuclei: Environment Variable Disclosure via Response-Derived Data in DAST/Fuzz Mode in github.com/projectdiscovery/nuclei","description":"Nuclei: Environment Variable Disclosure via Response-Derived Data in DAST/Fuzz Mode in github.com/projectdiscovery/nuclei","state":0,"publishedAt":"2026-10-01T20:23:38+00:00","modifiedAt":"2026-10-01T20:45:14.1000517+00:00","affected":[{"ecosystem":"Go","name":"github.com/projectdiscovery/nuclei","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"}]}],"versions":[],"rawVersionEvidence":null},{"ecosystem":"Go","name":"github.com/projectdiscovery/nuclei/v2","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"}]}],"versions":[],"rawVersionEvidence":null},{"ecosystem":"Go","name":"github.com/projectdiscovery/nuclei/v3","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"3.0.0"},{"kind":"fixed","version":"3.10.0"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[],"references":["https://github.com/projectdiscovery/nuclei/security/advisories/GHSA-jpvm-9frm-hjcq","https://nvd.nist.gov/vuln/detail/CVE-2026-76805","https://github.com/projectdiscovery/nuclei/commit/ccbfb12bd01447ba25f6e755dfb2bee677736da6","https://github.com/projectdiscovery/nuclei/pull/7499","https://github.com/projectdiscovery/nuclei/releases/tag/v3.10.0"],"sourceUrl":"https://osv.dev/vulnerability/GO-2026-6571","license":"OSV · upstream source license applies","key":"osv:GO-2026-6571","identifiers":["GO-2026-6571","CVE-2026-76805","GHSA-jpvm-9frm-hjcq"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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