CVE-2026-41646Published

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

Collected exploitation and prediction evidence

CISA KEV is observed exploitation evidence. FIRST EPSS is a dated prediction of exploitation in the next 30 days. Missing scores are unknown. This collector requests predictions only for explicit CVE aliases in the public NuGet archive; Microsoft release views retain their existing prediction scope.

No collected risk observation for these identifiers. This does not establish absence of exploitation or a zero probability.

cve-program · CVE-2026-41646

Published

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.

Source published: 8 May 2026 03:14:49 UTC
Source modified: 8 May 2026 14:11:15 UTC
Observed here: 23 Oct 2026 15:48:27 UTC
Source terms: CVE Program Terms of Use

Original source record · Cite this exact observation · Complete original publisher JSON

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CVSS 3.1 · 5.5 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

euvd · EUVD-2026-28499

Published

EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON.

Original publisher date fields

datePublished: May 8, 2026, 3:14:49 AM

dateUpdated: May 8, 2026, 2:11:15 PM

Source published: May 8, 2026, 3:14:49 AM (timezone not stated)
Source modified: May 8, 2026, 2:11:15 PM (timezone not stated)
Observed here: 7 Nov 2026 09:31:16 UTC
Source terms: ENISA EUVD · source terms and attribution apply

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EUVD CVSS 3.1 · 5.5 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

nvd · CVE-2026-41646

Published

NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON.

Source analysis status: Analyzed

Weakness classifications: CWE-284

Original publisher date fields

published: 2026-05-08T04:16:18.383

lastModified: 2026-10-26T00:10:00.150

1 source CPE criteria · context only

cpe:2.3:a:projectdiscovery:nuclei:*:*:*:*:*:go:*:*

The original JSON retains the logical configuration operators, exclusions and version bounds.

Source published: 8 May 2026 04:16:18 UTC
Source modified: 26 Oct 2026 00:10:00 UTC
Observed here: 27 Oct 2026 10:10:19 UTC
Source terms: NIST NVD usage terms; underlying source attribution retained

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: nvd · NIST NVD usage terms; underlying source attribution retained. Source text is retained; field grouping and change labels are provided by ChangeIntel.

CVSS 3.1 · [email protected] · Secondary · 5.5 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

osv · GHSA-29rg-wmcw-hpf4

Published

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 [email protected]

Source published: 22 Apr 2026 19:58:47 UTC
Source modified: 8 Jun 2026 20:09:36 UTC
Observed here: 24 Oct 2026 13:19:41 UTC
Source terms: GitHub Advisory Database · CC-BY-4.0

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This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: osv · GitHub Advisory Database · CC-BY-4.0. Source text is retained; field grouping and change labels are provided by ChangeIntel.

CVSS_V3 · CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

Publisher rating · MODERATE

osv · GO-2026-4965

Published

Nuclei: Local File Read via require() Module Loader Bypass in github.com/projectdiscovery/nuclei

Source published: 20 May 2026 19:07:16 UTC
Source modified: 20 May 2026 19:30:11 UTC
Observed here: 24 Oct 2026 13:19:41 UTC
Source terms: OSV · upstream source license applies

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: osv · OSV · upstream source license applies. Source text is retained; field grouping and change labels are provided by ChangeIntel.