Vulnerability-Lookup

CVE-2026-76804 (GCVE-0-2026-76804)

Vulnerability from cvelistv5 – Published: 2026-09-22 16:41 – Updated: 2026-09-28 19:17

Title

Nuclei: Local File Read via Workflow File-Protocol Gate Bypass

Summary

Nuclei is a vulnerability scanner built on a simple YAML-based DSL. From 3.0.0 until 3.10.0, the workflow template loading path does not enforce the -file capability gate when resolving file: protocol templates referenced by a workflow. An untrusted unsigned workflow can therefore load a file-protocol template and read local files from the scanner host even when the operator has not enabled file templates. The issue affects CLI users running workflows with -w and SDK integrations that accept end-user workflows while relying on the default file-access restriction. This issue is fixed in version 3.10.0.

Severity

5.5 (Medium)


                        
                          CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-28 19:17 UTC

CWE

CWE-284 - Improper Access Control

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 7644 records in the last 180 days details

References

4 references

URL	Tags
https://github.com/projectdiscovery/nuclei/securi…	x_refsource_CONFIRM
https://github.com/projectdiscovery/nuclei/pull/7489	x_refsource_MISC
https://github.com/projectdiscovery/nuclei/commit…	x_refsource_MISC
https://github.com/projectdiscovery/nuclei/releas…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version	CPE status
projectdiscovery	nuclei	Affected: >= 3.0.0, < 3.10.0	guessed

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-76804

Vulnerability from fkie_nvd - Published: 2026-09-22 17:17 - Updated: 2026-09-28 20:17

Severity

5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

Summary

References

	URL	Tags
	security-advisories@github.com	https://github.com/projectdiscovery/nuclei/commit/638be4481d27f1bbf90f971bbf6e3023777f2089
	security-advisories@github.com	https://github.com/projectdiscovery/nuclei/pull/7489
	security-advisories@github.com	https://github.com/projectdiscovery/nuclei/releases/tag/v3.10.0
	security-advisories@github.com	https://github.com/projectdiscovery/nuclei/security/advisories/GHSA-qgw5-7j4f-fg97

Impacted products

	Vendor	Product	Version

JSON

To clipboard

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    {
      "affectedData": [
        {
          "product": "nuclei",
          "vendor": "projectdiscovery",
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              "status": "affected",
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    }
  ],
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  "lastModified": "2026-09-28T20:17:10.803",
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GHSA-QGW5-7J4F-FG97

Vulnerability from github – Published: 2026-09-22 20:37 – Updated: 2026-09-22 20:37

Summary

Nuclei: Local File Read via Workflow File-Protocol Gate Bypass

Details

A vulnerability in Nuclei's workflow template loader allows file: protocol templates to execute without the -file flag, bypassing a security gate that is meant to prevent local file reads on the scanner host.

Affected Component

The issue is in the workflow template loading path. The main template loader enforces the -file gate for file-protocol templates, but the workflow loader did not apply the same check when resolving templates referenced by a workflow.

Description

Nuclei disables file-protocol templates by default because they read local files from the host running the scanner. Operators must explicitly enable them with the -file flag. When a workflow references a file-protocol template, the workflow loader accepted and executed that template without verifying that -file was enabled.

Because workflows run unsigned by default, an untrusted workflow could load and execute a file-protocol template and read local files from the scan target path, even though the operator had not enabled file templates.

[!NOTE] File-protocol templates are disabled by default. This issue only affects users who run workflows from untrusted sources without having explicitly enabled -file.

Affected Users

CLI users running workflows (-w) that reference file-protocol templates from untrusted or third-party sources.
SDK users who integrate Nuclei into platforms where end users can supply workflow files and rely on the default -file restriction to block local file access.

Patches

The vulnerability is fixed in Nuclei v3.10.0. Upgrading is strongly recommended.
Fix reference: https://github.com/projectdiscovery/nuclei/pull/7489

Mitigation

Upgrade to Nuclei v3.10.0, where template execution requirements (including the -file gate) are enforced consistently across the main loader, workflow parsing, and request compilation paths.

In the meantime, avoid running workflows from unverified sources.

Workarounds

If upgrading is not an option, do not run untrusted workflow files. There is no configuration flag that mitigates this bypass on affected versions.

Acknowledgments

Thanks to @daffainfo for reporting this issue.

Severity

5.5 (Medium)


                  
                    CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

Show details on source website

JSON

To clipboard

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      "package": {
        "ecosystem": "Go",
        "name": "github.com/projectdiscovery/nuclei/v3"
      },
      "ranges": [
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            }
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        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-76804"
  ],
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    "cwe_ids": [
      "CWE-284"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-09-22T20:37:21Z",
    "nvd_published_at": "2026-09-22T17:17:24Z",
    "severity": "MODERATE"
  },
  "details": "A vulnerability in Nuclei\u0027s workflow template loader allows `file:` protocol templates to execute without the `-file` flag, bypassing a security gate that is meant to prevent local file reads on the scanner host.\n\n**Affected Component**\n\nThe issue is in the workflow template loading path. The main template loader enforces the `-file` gate for file-protocol templates, but the workflow loader did not apply the same check when resolving templates referenced by a workflow.\n\n**Description**\n\nNuclei disables file-protocol templates by default because they read local files from the host running the scanner. Operators must explicitly enable them with the `-file` flag. When a workflow references a file-protocol template, the workflow loader accepted and executed that template without verifying that `-file` was enabled.\n\nBecause workflows run unsigned by default, an untrusted workflow could load and execute a file-protocol template and read local files from the scan target path, even though the operator had not enabled file templates.\n\n\u003e [!NOTE]\nFile-protocol templates are disabled by default. This issue only affects users who run workflows from untrusted sources without having explicitly enabled `-file`.\n\n**Affected Users**\n\n- **CLI users** running workflows (`-w`) that reference file-protocol templates from untrusted or third-party sources.\n- **SDK users** who integrate Nuclei into platforms where end users can supply workflow files and rely on the default `-file` restriction to block local file access.\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/7489\n\n**Mitigation**\n\nUpgrade to Nuclei v3.10.0, where template execution requirements (including the `-file` gate) are enforced consistently across the main loader, workflow parsing, and request compilation paths.\n\nIn the meantime, avoid running workflows from unverified sources.\n\n**Workarounds**\n\nIf upgrading is not an option, do not run untrusted workflow files. There is no configuration flag that mitigates this bypass on affected versions.\n\n**Acknowledgments**\n\nThanks to @daffainfo for reporting this issue.",
  "id": "GHSA-qgw5-7j4f-fg97",
  "modified": "2026-09-22T20:37:22Z",
  "published": "2026-09-22T20:37:21Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/projectdiscovery/nuclei/security/advisories/GHSA-qgw5-7j4f-fg97"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-76804"
    },
    {
      "type": "WEB",
      "url": "https://github.com/projectdiscovery/nuclei/pull/7489"
    },
    {
      "type": "WEB",
      "url": "https://github.com/projectdiscovery/nuclei/commit/638be4481d27f1bbf90f971bbf6e3023777f2089"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/projectdiscovery/nuclei"
    },
    {
      "type": "WEB",
      "url": "https://github.com/projectdiscovery/nuclei/releases/tag/v3.10.0"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Nuclei: Local File Read via Workflow File-Protocol Gate Bypass"
}

Sightings

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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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CVE-2026-76804 (GCVE-0-2026-76804)

FKIE_CVE-2026-76804

GHSA-QGW5-7J4F-FG97

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