Vulnerability-Lookup

CVE-2026-41646 (GCVE-0-2026-41646)

Vulnerability from cvelistv5 – Published: 2026-05-08 03:14 – Updated: 2026-05-08 14:11

Title

Nuclei: Local File Read via require() Module Loader Bypass

Summary

Nuclei is a vulnerability scanner built on a simple YAML-based DSL. From version 3.0.0 to before version 3.8.0, a vulnerability in Nuclei's JavaScript protocol runtime allows JavaScript templates to read local .js and .json files through the require() function, bypassing the default local file access restriction. This issue has been patched in version 3.8.0.

Severity ?

5.5 (Medium)


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

CWE

CWE-284 - Improper Access Control

Assigner

GitHub_M

References

URL

Tags

	https://github.com/projectdiscovery/nuclei/securi…	x_refsource_CONFIRM
	https://github.com/projectdiscovery/nuclei/pull/7332	x_refsource_MISC
	https://github.com/projectdiscovery/nuclei/commit…	x_refsource_MISC

Impacted products

	Vendor	Product	Version
	projectdiscovery	nuclei	Affected: >= 3.0.0, < 3.8.0

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-41646

Vulnerability from fkie_nvd - Published: 2026-05-08 04:16 - Updated: 2026-05-08 19:42

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/6f2ade6a9b427c284c15a43445f9c7f055e60e5d	Patch
security-advisories@github.com	https://github.com/projectdiscovery/nuclei/pull/7332	Issue Tracking, Patch
security-advisories@github.com	https://github.com/projectdiscovery/nuclei/security/advisories/GHSA-29rg-wmcw-hpf4	Mitigation, Patch, Vendor Advisory
134c704f-9b21-4f2e-91b3-4a467353bcc0	https://github.com/projectdiscovery/nuclei/pull/7332	Issue Tracking, Patch

Impacted products

	Vendor	Product	Version
	projectdiscovery	nuclei	*

JSON

To clipboard

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
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              "criteria": "cpe:2.3:a:projectdiscovery:nuclei:*:*:*:*:*:go:*:*",
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              "versionEndExcluding": "3.8.0",
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          "operator": "OR"
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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Nuclei is a vulnerability scanner built on a simple YAML-based DSL. From version 3.0.0 to before version 3.8.0, a vulnerability in Nuclei\u0027s JavaScript protocol runtime allows JavaScript templates to read local .js and .json files through the require() function, bypassing the default local file access restriction. This issue has been patched in version 3.8.0."
    }
  ],
  "id": "CVE-2026-41646",
  "lastModified": "2026-05-08T19:42:59.247",
  "metrics": {
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        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
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          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
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          "privilegesRequired": "NONE",
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          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N",
          "version": "3.1"
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        "impactScore": 3.6,
        "source": "security-advisories@github.com",
        "type": "Secondary"
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        "Patch"
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  "vulnStatus": "Analyzed",
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          "value": "CWE-284"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}

GHSA-29RG-WMCW-HPF4

Vulnerability from github – Published: 2026-04-22 19:58 – Updated: 2026-04-22 19:58

Summary

Nuclei: Local File Read via require() Module Loader Bypass

Details

A vulnerability in Nuclei's JavaScript protocol runtime allows JavaScript templates to read local .js and .json files through the require() function, bypassing the default local file access restriction.

Affected Component

The issue is in the JavaScript runtime's module loading system. The goja require() function used a default host filesystem loader without routing through the allow-local-file-access check.

Description

The goja require() function in Nuclei's JavaScript protocol runtime used the default host filesystem loader, which allowed JavaScript templates to import .js and .json files from anywhere on the host filesystem, ignoring the allow-local-file-access (-lfa) option that controls file access outside the template directory.

The impact is limited to .js and .json files, as goja's module loader only resolves those extensions. That said, this is still enough to expose sensitive data stored in JSON configuration files like package.json, credential stores, or cloud configuration files sitting on the host filesystem.

Affected Users

CLI users running untrusted or third-party JavaScript templates.
SDK users who have integrated Nuclei into platforms where end-users can supply JavaScript templates, especially when relying on the default file access restriction to limit filesystem reads.

[!NOTE] The require() module loader only resolves .js and .json files. Other file types cannot be read through this vector.

Patches

The vulnerability is fixed in Nuclei v3.8.0. Upgrading is strongly recommended.
Fix reference: #7332

Mitigation

Upgrade to Nuclei v3.8.0, where the require() registry is rebuilt per execution and file-backed module loads are routed through the same allow-local-file-access check as the rest of the filesystem operations.

In the meantime, avoid running JavaScript templates from unverified sources.

Workarounds

If upgrading is not an option, avoid running untrusted JavaScript templates entirely. There is no flag or configuration that mitigates this on affected versions.

Acknowledgments

Nuceli thanks @AkashHamal0x01 for reporting this issue through responsible disclosure via security@projectdiscovery.io

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

{
  "affected": [
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/projectdiscovery/nuclei/v3"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "3.0.0"
            },
            {
              "fixed": "3.8.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-41646"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-284"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-04-22T19:58:47Z",
    "nvd_published_at": null,
    "severity": "MODERATE"
  },
  "details": "A vulnerability in Nuclei\u0027s JavaScript protocol runtime allows JavaScript templates to read local `.js` and `.json` files through the `require()` function, bypassing the default local file access restriction.\n\n**Affected Component**\n\nThe issue is in the JavaScript runtime\u0027s module loading system. The goja `require()` function used a default host filesystem loader without routing through the `allow-local-file-access` check.\n\n**Description**\n\nThe goja require() function in Nuclei\u0027s JavaScript protocol runtime used the default host filesystem loader, which allowed JavaScript templates to import .js and .json files from anywhere on the host filesystem, ignoring the allow-local-file-access (-lfa) option that controls file access outside the template directory.\n\nThe impact is limited to `.js` and `.json` files, as goja\u0027s module loader only resolves those extensions. That said, this is still enough to expose sensitive data stored in JSON configuration files like `package.json`, credential stores, or cloud configuration files sitting on the host filesystem.\n\n**Affected Users**\n\n- **CLI users** running untrusted or third-party JavaScript templates.\n- **SDK users** who have integrated Nuclei into platforms where end-users can supply JavaScript templates, especially when relying on the default file access restriction to limit filesystem reads.\n\n\u003e [!NOTE]\nThe `require()` module loader only resolves `.js` and `.json` files. Other file types cannot be read through this vector.\n\n**Patches**\n\n- The vulnerability is fixed in Nuclei v3.8.0. Upgrading is strongly recommended. \n- Fix reference: #7332\n\n**Mitigation**\n\nUpgrade to Nuclei v3.8.0, where the `require()` registry is rebuilt per execution and file-backed module loads are routed through the same `allow-local-file-access` check as the rest of the filesystem operations.\n\nIn the meantime, avoid running JavaScript templates from unverified sources.\n\n**Workarounds**\n\nIf upgrading is not an option, avoid running untrusted JavaScript templates entirely. There is no flag or configuration that mitigates this on affected versions.\n\n**Acknowledgments**\n\nNuceli thanks @AkashHamal0x01 for reporting this issue through responsible disclosure via security@projectdiscovery.io",
  "id": "GHSA-29rg-wmcw-hpf4",
  "modified": "2026-04-22T19:58:47Z",
  "published": "2026-04-22T19:58:47Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/projectdiscovery/nuclei/security/advisories/GHSA-29rg-wmcw-hpf4"
    },
    {
      "type": "WEB",
      "url": "https://github.com/projectdiscovery/nuclei/pull/7332"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/projectdiscovery/nuclei"
    }
  ],
  "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 require() Module Loader Bypass"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

CVE-2026-41646 (GCVE-0-2026-41646)

FKIE_CVE-2026-41646

GHSA-29RG-WMCW-HPF4

Tags

Sightings

Nomenclature