Packages
- nginx - small, powerful, scalable web/proxy server
Details
USN-8563-1 fixed vulnerabilities in nginx. One of the fixes introduced ABI
changes that could cause issues with external modules. This update reverts
the fix for CVE-2026-42533 pending further investigation.
We apologize for the inconvenience.
Original advisory details:
It was discovered that nginx incorrectly handled certain map directives
using regex matching and capture variables. A remote attacker could use
this issue to cause nginx to crash, resulting in a denial of service, or
possibly execute arbitrary code. (CVE-2026-42533)
It was discovered that nginx had a use-after-free vulnerability in the
ngx_http_ssi_module module when configured with Server-Side Includes,
proxy_pass, and proxy buffering disabled directives. An attacker able to
intercept traffic and control responses from an upstream server could
possibly use this...
USN-8563-1 fixed vulnerabilities in nginx. One of the fixes introduced ABI
changes that could cause issues with external modules. This update reverts
the fix for CVE-2026-42533 pending further investigation.
We apologize for the inconvenience.
Original advisory details:
It was discovered that nginx incorrectly handled certain map directives
using regex matching and capture variables. A remote attacker could use
this issue to cause nginx to crash, resulting in a denial of service, or
possibly execute arbitrary code. (CVE-2026-42533)
It was discovered that nginx had a use-after-free vulnerability in the
ngx_http_ssi_module module when configured with Server-Side Includes,
proxy_pass, and proxy buffering disabled directives. An attacker able to
intercept traffic and control responses from an upstream server could
possibly use this issue to cause nginx to crash, resulting in a denial of
service. (CVE-2026-56434)
It was discovered that nginx incorrectly handled certain requests in the
ngx_http_slice_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-2026-60005)
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 – 1.28.3-2ubuntu1.8 | ||
| nginx-core – 1.28.3-2ubuntu1.8 | |||
| nginx-extras – 1.28.3-2ubuntu1.8 | |||
| nginx-full – 1.28.3-2ubuntu1.8 | |||
| nginx-light – 1.28.3-2ubuntu1.8 | |||
| 24.04 LTS noble | nginx – 1.24.0-2ubuntu7.15 | ||
| nginx-core – 1.24.0-2ubuntu7.15 | |||
| nginx-extras – 1.24.0-2ubuntu7.15 | |||
| nginx-full – 1.24.0-2ubuntu7.15 | |||
| nginx-light – 1.24.0-2ubuntu7.15 | |||
| 22.04 LTS jammy | nginx – 1.18.0-6ubuntu14.18 | ||
| nginx-core – 1.18.0-6ubuntu14.18 | |||
| nginx-extras – 1.18.0-6ubuntu14.18 | |||
| nginx-full – 1.18.0-6ubuntu14.18 | |||
| nginx-light – 1.18.0-6ubuntu14.18 | |||
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