CVE-2026-48142
4.8 · MEDIUMOverview
CVE-2026-48142 is a medium-severity vulnerability affecting f5 dos. It was published on June 17, 2026 and has a CVSS 3.1 base score of 4.8 (MEDIUM).
This vulnerability has a CVSS 3.1 base score of 4.8, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical Description
NGINX Plus and NGINX Open Source have a vulnerability in the ngx_http_charset_module module. When content is served or proxied through a location block with both source_charset utf-8; and a charset directive (for example, charset koi8-r;) configured, remote, unauthenticated attackers can send requests (in conjunction with conditions beyond their control) to cause a heap buffer over-read in the NGINX worker process, leading to limited disclosure of memory or a restart.
Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
Remediation
Check the references section for vendor advisories and patches from f5. Update dos to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| f5 | dos | 4.3.0 | Affected |
| f5 | nginx_gateway_fabric | 1.3.0 | Affected |
| f5 | nginx_ingress_controller | 3.5.0 | Affected |
| f5 | nginx_instance_manager | 2.17.0 | Affected |
| f5 | nginx_open_source | 1.0.0 | Affected |
| f5 | nginx_plus | >= 37.0.0.1, < 37.0.2.1 | Affected |
| f5 | waf | 4.10.0 | Affected |
References
Frequently Asked Questions
What is CVE-2026-48142?
CVE-2026-48142 is a medium-severity vulnerability affecting f5 dos. It was published on June 17, 2026 and has a CVSS 3.1 base score of 4.8 (MEDIUM).
How severe is CVE-2026-48142?
This vulnerability has a CVSS 3.1 base score of 4.8, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2026-48142?
Check the references section for vendor advisories and patches from f5. Update dos to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2026-48142?
CyberStrike's AI-powered security agents can automatically detect CVE-2026-48142 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
Automated penetration testing that runs continuously, not just quarterly.
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Browser-based exploitation validates findings with real proof-of-concept.
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