Packages
- nginx - small, powerful, scalable web/proxy server
Details
USN-8398-1 fixed a vulnerability in nginx. The update introduced a
regression causing nginx to crash when being used with external modules.
This update reverts the fix for CVE-2026-49975 pending further
investigation.
We apologize for the inconvenience.
Original advisory details:
It was discovered that nginx incorrectly handled certain cookie headers in
the HTTP/2 implementation. A remote attacker could possibly use this issue
to cause nginx to consume excessive resources, resulting in a denial of
service.
USN-8398-1 fixed a vulnerability in nginx. The update introduced a
regression causing nginx to crash when being used with external modules.
This update reverts the fix for CVE-2026-49975 pending further
investigation.
We apologize for the inconvenience.
Original advisory details:
It was discovered that nginx incorrectly handled certain cookie headers in
the HTTP/2 implementation. A remote attacker could possibly use this issue
to cause nginx to consume excessive resources, resulting in a denial of
service.
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 – 1.28.3-2ubuntu1.4 | ||
| nginx-core – 1.28.3-2ubuntu1.4 | |||
| nginx-extras – 1.28.3-2ubuntu1.4 | |||
| nginx-full – 1.28.3-2ubuntu1.4 | |||
| nginx-light – 1.28.3-2ubuntu1.4 | |||
| 25.10 questing | nginx – 1.28.0-6ubuntu1.6 | ||
| nginx-core – 1.28.0-6ubuntu1.6 | |||
| nginx-extras – 1.28.0-6ubuntu1.6 | |||
| nginx-full – 1.28.0-6ubuntu1.6 | |||
| nginx-light – 1.28.0-6ubuntu1.6 | |||
| 24.04 LTS noble | nginx – 1.24.0-2ubuntu7.11 | ||
| nginx-core – 1.24.0-2ubuntu7.11 | |||
| nginx-extras – 1.24.0-2ubuntu7.11 | |||
| nginx-full – 1.24.0-2ubuntu7.11 | |||
| nginx-light – 1.24.0-2ubuntu7.11 | |||
| 22.04 LTS jammy | nginx – 1.18.0-6ubuntu14.14 | ||
| nginx-core – 1.18.0-6ubuntu14.14 | |||
| nginx-extras – 1.18.0-6ubuntu14.14 | |||
| nginx-full – 1.18.0-6ubuntu14.14 | |||
| nginx-light – 1.18.0-6ubuntu14.14 | |||
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