Packages
- nginx - small, powerful, scalable web/proxy server
Details
It was discovered that nginx did not properly validate source addresses in
the HTTP/3 QUIC module. A remote attacker could possibly use this issue to
bypass authorization checks or rate limiting. This issue only affected
Ubuntu 25.04 and Ubuntu 25.10. (CVE-2026-40460)
It was discovered that nginx contained a use-after-free vulnerability in
the ngx_http_ssl_module module when client certificate verification and
OCSP validation were enabled. A remote attacker could use this issue to
cause nginx to crash, resulting in a denial of service, or possibly modify
data in memory. (CVE-2026-40701)
It was discovered that nginx did not properly handle certain proxied
responses in the ngx_http_charset_module module. A remote attacker could
possibly use this issue to obtain sensitive information or cause nginx to
crash, resulting in a denial of service. (
It was discovered that nginx did not properly validate source addresses in
the HTTP/3 QUIC module. A remote attacker could possibly use this issue to
bypass authorization checks or rate limiting. This issue only affected
Ubuntu 25.04 and Ubuntu 25.10. (CVE-2026-40460)
It was discovered that nginx contained a use-after-free vulnerability in
the ngx_http_ssl_module module when client certificate verification and
OCSP validation were enabled. A remote attacker could use this issue to
cause nginx to crash, resulting in a denial of service, or possibly modify
data in memory. (CVE-2026-40701)
It was discovered that nginx did not properly handle certain proxied
responses in the ngx_http_charset_module module. A remote attacker could
possibly use this issue to obtain sensitive information or cause nginx to
crash, resulting in a denial of service. (CVE-2026-42934)
It was discovered that nginx did not properly process certain SCGI and
uWSGI responses. An attacker able to perform a machine-in-the-middle attack
could possibly use this issue to obtain sensitive information or cause
nginx to crash, resulting in a denial of service. (CVE-2026-42946)
It was discovered that nginx incorrectly handled certain rewrite rules in
the ngx_http_rewrite_module module. A remote attacker could use this issue
to cause nginx to crash, resulting in a denial of service, or possibly
execute arbitrary code. (CVE-2026-9256)
Update instructions
In general, a standard system update will make all the necessary changes.
Learn more about how to get the fixes.The problem can be corrected by updating your system to the following package versions:
| Ubuntu Release | Package Version | ||
|---|---|---|---|
| 26.04 LTS resolute | nginx – 1.28.3-2ubuntu1.2 | ||
| nginx-core – 1.28.3-2ubuntu1.2 | |||
| nginx-extras – 1.28.3-2ubuntu1.2 | |||
| nginx-full – 1.28.3-2ubuntu1.2 | |||
| nginx-light – 1.28.3-2ubuntu1.2 | |||
| 25.10 questing | nginx – 1.28.0-6ubuntu1.4 | ||
| nginx-core – 1.28.0-6ubuntu1.4 | |||
| nginx-extras – 1.28.0-6ubuntu1.4 | |||
| nginx-full – 1.28.0-6ubuntu1.4 | |||
| nginx-light – 1.28.0-6ubuntu1.4 | |||
| 24.04 LTS noble | nginx – 1.24.0-2ubuntu7.9 | ||
| nginx-core – 1.24.0-2ubuntu7.9 | |||
| nginx-extras – 1.24.0-2ubuntu7.9 | |||
| nginx-full – 1.24.0-2ubuntu7.9 | |||
| nginx-light – 1.24.0-2ubuntu7.9 | |||
| 22.04 LTS jammy | nginx – 1.18.0-6ubuntu14.12 | ||
| nginx-core – 1.18.0-6ubuntu14.12 | |||
| nginx-extras – 1.18.0-6ubuntu14.12 | |||
| nginx-full – 1.18.0-6ubuntu14.12 | |||
| nginx-light – 1.18.0-6ubuntu14.12 | |||
Reduce your security exposure
Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.