========================================================================== Ubuntu Security Notice USN-8458-1 June 22, 2026
nginx vulnerabilities ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 26.04 LTS - Ubuntu 25.10 - Ubuntu 24.04 LTS - Ubuntu 22.04 LTS Summary: Several security issues were fixed in nginx. Software Description: - nginx: small, powerful, scalable web/proxy server Details: It was discovered that nginx incorrectly handled large headers when proxying HTTP/2 traffic. A remote attacker could use this issue to cause nginx to crash, resulting in a denial of service, or possibly execute arbitrary code. The default compiler options for affected releases should reduce the vulnerability to a denial of service. (CVE-2026-42055) It was discovered that nginx incorrectly handled character set conversion under certain circumstances. A remote attacker could possibly use this issue to obtain sensitive information or cause nginx to crash, resulting in a denial of service. (CVE-2026-48142) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 26.04 LTS nginx 1.28.3-2ubuntu1.6 nginx-core 1.28.3-2ubuntu1.6 nginx-extras 1.28.3-2ubuntu1.6 nginx-full 1.28.3-2ubuntu1.6 nginx-light 1.28.3-2ubuntu1.6 Ubuntu 25.10 nginx 1.28.0-6ubuntu1.8 nginx-core 1.28.0-6ubuntu1.8 nginx-extras 1.28.0-6ubuntu1.8 nginx-full 1.28.0-6ubuntu1.8 nginx-light 1.28.0-6ubuntu1.8 Ubuntu 24.04 LTS nginx 1.24.0-2ubuntu7.13 nginx-core 1.24.0-2ubuntu7.13 nginx-extras 1.24.0-2ubuntu7.13 nginx-full 1.24.0-2ubuntu7.13 nginx-light 1.24.0-2ubuntu7.13 Ubuntu 22.04 LTS nginx 1.18.0-6ubuntu14.16 nginx-core 1.18.0-6ubuntu14.16 nginx-extras 1.18.0-6ubuntu14.16 nginx-full 1.18.0-6ubuntu14.16 nginx-light 1.18.0-6ubuntu14.16 In general, a standard system update will make all the necessary changes. References: https://ubuntu.com/security/notices/USN-8458-1 CVE-2026-42055, CVE-2026-48142 Package Information: https://launchpad.net/ubuntu/+source/nginx/1.28.3-2ubuntu1.6 https://launchpad.net/ubuntu/+source/nginx/1.28.0-6ubuntu1.8 https://launchpad.net/ubuntu/+source/nginx/1.24.0-2ubuntu7.13 https://launchpad.net/ubuntu/+source/nginx/1.18.0-6ubuntu14.16
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