GO-2026-6577Published

Nuclei: Local File Read via MySQL Client Sandbox 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-2026-76803

Published

Nuclei is a vulnerability scanner built on a simple YAML-based DSL. From 3.0.0 until 3.10.0, the nuclei/mysql JavaScript library does not enforce the local-file sandbox when a JavaScript template supplies the allowAllFiles MySQL DSN option. An untrusted javascript: template scanning an attacker-controlled MySQL-compatible endpoint can cause the server to issue LOAD DATA LOCAL INFILE requests for arbitrary paths, after which the scanner's MySQL client reads the files and returns their contents to the server even though -allow-local-file-access is disabled. JavaScript templates can run unsigned and without the -code flag on affected versions, and the bypass affects CLI and SDK deployments that accept untrusted templates. This issue is fixed in version 3.10.0.

Source published: 22 Sep 2026 16:27:59 UTC
Source modified: 25 Sep 2026 23:44:38 UTC
Observed here: 23 Oct 2026 15:48:27 UTC
Source terms: CVE Program Terms of Use

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CVSS 3.1 · 5.3 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N

euvd · EUVD-2026-84553

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: Sep 22, 2026, 4:27:59 PM

dateUpdated: Sep 25, 2026, 11:44:38 PM

Source published: Sep 22, 2026, 4:27:59 PM (timezone not stated)
Source modified: Sep 25, 2026, 11:44:38 PM (timezone not stated)
Observed here: 11 Nov 2026 16:07:47 UTC
Source terms: ENISA EUVD · source terms and attribution apply

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EUVD CVSS 3.1 · 5.3 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N

nvd · CVE-2026-76803

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: Awaiting Analysis

Weakness classifications: CWE-284

Original publisher date fields

published: 2026-09-22T17:17:24.797

lastModified: 2026-09-26T00:16:35.217

Source published: 22 Sep 2026 17:17:24 UTC
Source modified: 26 Sep 2026 00:16:35 UTC
Observed here: 25 Oct 2026 16:19:04 UTC
Source terms: NIST NVD usage terms; underlying source attribution retained

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CVSS 3.1 · [email protected] · Secondary · 5.3 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N

osv · GHSA-xhmx-w2j4-rw3q

Published

A vulnerability in Nuclei's JavaScript MySQL client library allows arbitrary local file reads that bypass the `-allow-local-file-access` (`-lfa`) sandbox restriction. **Affected Component** The issue is in the `nuclei/mysql` JavaScript library used by `javascript:` protocol templates. The MySQL client connection logic did not enforce the local file access sandbox when handling the `allowAllFiles` DSN parameter used by `LOAD DATA LOCAL INFILE`. **Description** Without `-lfa`, Nuclei confines local file access to the templates directory. However, a `javascript:` template could connect to a MySQL server with `allowAllFiles=true` in the connection DSN. With this option enabled, a malicious MySQL server can issue `LOAD DATA LOCAL INFILE` requests for arbitrary paths on the scanner host. The MySQL client reads the full file contents and sends them to the server, bypassing the same sandbox that blocks direct filesystem reads through other APIs. `javascript:` templates execute without the `-code` flag and unsigned `javascript:` templates run by default, making this reachable from untrusted third-party templates when scanning attacker-controlled MySQL endpoints. > [!NOTE] The `-allow-local-file-access` (`-lfa`) option is off by default. This issue allows bypassing that restriction, not merely expanding an already-enabled capability. **Affected Users** - **CLI users** running untrusted or third-party `javascript:` templates against MySQL-compatible targets. - **SDK users** who integrate Nuclei into platforms where end users can supply JavaScript templates and rely on the default `-lfa` restriction to limit filesystem access. **Patches** - The vulnerability is fixed in Nuclei v3.10.0. Upgrading is strongly recommended. - Fix reference: https://github.com/projectdiscovery/nuclei/pull/7473 **Mitigation** Upgrade to Nuclei v3.10.0, where the `allowAllFiles` DSN option is stripped unless `-lfa` is explicitly enabled. In the meantime, avoid running JavaScript templates from unverified sources, especially against untrusted database endpoints. **Workarounds** If upgrading is not an option, avoid running untrusted JavaScript templates. There is no flag or configuration that mitigates this bypass on affected versions. **Acknowledgments** Thanks to @daffainfo for reporting this issue.

Source published: 22 Sep 2026 20:37:19 UTC
Source modified: 1 Oct 2026 20:55:40 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:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N

Publisher rating · MODERATE

osv · GO-2026-6577

Published

Nuclei: Local File Read via MySQL Client Sandbox Bypass in github.com/projectdiscovery/nuclei

Source published: 1 Oct 2026 20:23:38 UTC
Source modified: 1 Oct 2026 20:45:16 UTC
Observed here: 24 Oct 2026 13:19:41 UTC
Source terms: OSV · upstream source license applies

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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 · OSV · upstream source license applies. Source text is retained; field grouping and change labels are provided by ChangeIntel.