CVE-2026-76803Network attack vectorHinoki check available

Local file disclosure via MySQL sandbox bypass

Published Sep 22, 2026 · Updated Sep 22, 2026

Sandbox bypass in ProjectDiscovery Nuclei allows remote attackers to read arbitrary local files through an attacker-controlled MySQL server. The nuclei/mysql JavaScript library accepts allowAllFiles in a template-supplied DSN, then honors LOAD DATA LOCAL INFILE requests without enforcing the local-file sandbox. Exploitation requires a user or integrated service to run an untrusted JavaScript template against the attacker's MySQL-compatible endpoint; the server receives the requested file contents.

CVSS severity5.3
Medium
EPSS probability0.40%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Sandbox bypass in ProjectDiscovery Nuclei allows remote attackers to read arbitrary local files through an attacker-controlled MySQL server. The nuclei/mysql JavaScript library accepts allowAllFiles in a template-supplied DSN, then honors LOAD DATA LOCAL INFILE requests without enforcing the local-file sandbox. Exploitation requires a user or integrated service to run an untrusted JavaScript template against the attacker's MySQL-compatible endpoint; the server receives the requested file contents.

The record

CVE
CVE-2026-76803
Published
Sep 22, 2026
Updated
Sep 22, 2026
Vendor
ProjectDiscovery
Product
Nuclei
Classifications
CWE-284, T1005, T1204.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 22, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 22, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>= 3.0.0, < 3.10.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

ProjectDiscovery · Nucleiversion=>= 3.0.0, < 3.10.0

Published CVSS scores

5.3GitHub Security AdvisoryCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-284Improper Access Control
T1005Data from Local System
T1204.002Malicious File

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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