Live › vulnerability › CVE-2026-76805
Go to dashboardNuclei's DAST/fuzz path can evaluate response data a second time as template syntax, so a malicious scan target can make the scanner resolve host environment variables. An attacker who controls a scan target can read scanner-host secrets such as credentials, API keys, or tokens.
Summary written from the sources below. Check the originals before acting.
First seen by InfraStack 2026-10-23 19:13 UTC, 0h before NVD. All times on this page are UTC.
| Product | Ecosystem | Affected | Fixed in |
|---|
| github.com/projectdiscovery/nuclei | go | all versions | – |
| github.com/projectdiscovery/nuclei/v2 | go | all versions | – |
| github.com/projectdiscovery/nuclei/v3 | go | >= 3.0.0, < 3.10.0 | 3.10.0 |
3.10.03.10.0 or laterEach row is the first time that source carried this signal. The analyst’s rows are its own findings.
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.
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