Nuclei: Environment Variable Disclosure via Response-Derived Data in DAST/Fuzz Mode
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
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| projectdiscovery | nuclei | affected |
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| Projectdiscovery | Nuclei |
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| Source | ID | Title |
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Github GHSA |
GHSA-jpvm-9frm-hjcq | Nuclei: Environment Variable Disclosure via Response-Derived Data in DAST/Fuzz Mode |
No CVSS v4.0
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.410% probability within 30 days)
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ssvc
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| First Time appeared |
Projectdiscovery
Projectdiscovery nuclei |
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| Vendors & Products |
Projectdiscovery
Projectdiscovery nuclei |
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| 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. | |
| Title | Nuclei: Environment Variable Disclosure via Response-Derived Data in DAST/Fuzz Mode | |
| Weaknesses | CWE-200 | |
| References |
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| Metrics |
cvssV3_1
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