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

Quick assessment

Affected
projectdiscovery nuclei
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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 javasc

CVSS 5.3 · Medium

Affected Version Matrix 1

VendorProduct Version RangeStatus
projectdiscovery nuclei >= 3.0.0, < 3.10.0 affected
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I. Basic Information for CVE-2026-76803

Vulnerability Information

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Vulnerability Title
Nuclei: Local File Read via MySQL Client Sandbox Bypass
Source: CVE Program / CVE List V5
Vulnerability Description
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: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
访问控制不恰当
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
projectdiscovery nuclei >= 3.0.0, < 3.10.0 -

II. Public POCs for CVE-2026-76803

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III. Intelligence Information for CVE-2026-76803

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Patches & Fixes for CVE-2026-76803 (2)

Proof of Concept for CVE-2026-76803 (2)

Same Patch Batch · projectdiscovery · 2026-09-22 · 4 CVEs total

CVE-2026-76804 5.5 MEDIUM Nuclei: Local File Read via Workflow File-Protocol Gate Bypass
CVE-2026-76805 5.3 MEDIUM Nuclei: Environment Variable Disclosure via Response-Derived Data in DAST/Fuzz Mode
CVE-2026-76802 4.7 MEDIUM Nuclei: Arbitrary Command Execution via DAST Code Signature Bypass

IV. Related Vulnerabilities

Same product: nuclei
Same vendor: projectdiscovery
Same weakness: CWE-284

V. Comments for CVE-2026-76803

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