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TI-2026-53662 Aliases CVE-2026-76805GHSA-jpvm-9frm-hjcq

Nuclei: Environment Variable Disclosure via Response-Derived Data in DAST/Fuzz Mode

Priority LOW 24CWE-200Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
High
Impact type
Information disclosure
Confidentiality · integrity · availability
High · None · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-200.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0041 35th percentileScored 2026-11-07
Fix Fixed nuclei (projectdiscovery): 3.10.0github.com/projectdiscovery/nuclei/v3 (Go): 3.10.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
projectdiscoverynuclei3.0.0 to before 3.10.03.10.0Patch availableCNA
—github.com/projectdiscovery/nuclei/v3 (Go)3.0.0 to before 3.10.03.10.0Patch availableGHSA-jpvm-9frm-hjcq
  • nuclei Vendorprojectdiscovery Affected 3.0.0 to before 3.10.0 Fixed in 3.10.0 Patch available CNA
  • github.com/projectdiscovery/nuclei/v3 (Go) Vendor— Affected 3.0.0 to before 3.10.0 Fixed in 3.10.0 Patch available GHSA-jpvm-9frm-hjcq

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:projectdiscovery:nuclei:*:*:*:*:*:*:*:*——projectdiscovery
  • cpe:2.3:a:projectdiscovery:nuclei:*:*:*:*:*:*:*:* Versions — — ·projectdiscovery

Remediation

  • Fix · CNA nuclei (projectdiscovery) Fixed in 3.10.0
  • Fix · GHSA-jpvm-9frm-hjcq github.com/projectdiscovery/nuclei/v3 (Go) Fixed in 3.10.0 Advisory →

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-76805
  2. 2026-10-03 Alias added: GHSA-jpvm-9frm-hjcq

References

Advisory 1

Other 5

  • TI-2024-29054 Nuclei Template Signature Verification Bypass CVSS 3.1HIGH 7.8
  • TI-2023-18315 Interactsh server settings make users vulnerable to Subdomain Takeover CVSS 3.1HIGH 8.2
  • TI-2024-27052 Unsigned code template execution through workflows in projectdiscovery/nuclei CVSS 3.1HIGH 7.4
  • TI-2026-62486 Nuclei from 3.7.0 before 3.11.1 Template Signature Bypass via Modification-Time-Only Cache CVSS 4.0HIGH 7.0
  • TI-2026-29888 Code injection in projectdiscovery Nuclei CVSS 3.1HIGH 7.5
  • TI-2026-30165 Nuclei: Local File Read via require() Module Loader Bypass CVSS 3.1MEDIUM 5.5
See all 13 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences