High Threat Security Alert (A26-05-36): Multiple Vulnerabilities in Nginx Products

Description:

Nginx has released security updates to address multiple vulnerabilities in several Nginx products. For information about the vulnerabilities and the attacking vectors, please refer to the corresponding security advisories at the vendor's website.

Reports indicated that a denial of service and remote code execution vulnerability (CVE-2026-42945) is being exploited in the wild. System administrators are advised to take immediate action to patch your affected systems to mitigate the elevated risk of cyber attacks.

Affected Systems:

• Nginx version prior to nginx-1.30.1 stable
• Nginx version prior to nginx-1.31.0 mainline

For detailed information of the affected systems, please refer to the corresponding security advisories at vendor's website.

Impact:

Successful exploitation of the vulnerabilities could lead to remote code execution, denial of service, information disclosure, security restriction bypass, spoofing or tampering on an affected system.

Recommendation:

Software updates for affected systems are now available. System administrators of affected systems should follow the recommendations provided by the product vendor and take immediate actions to mitigate the risk.

System administrators should contact their product support vendors for the fixes and assistance.

More Information:

• https://nginx.org/2026.html
• https://www.hkcert.org/security-bulletin/nginx-multiple-vulnerabilities_20260515
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-40460
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-40701
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-42926
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-42934
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-42945 (to CVE-2026-42946)