CVE-2026-42946
Publication date 13 May 2026
Last updated 2 June 2026
Ubuntu priority
Description
A vulnerability exists in the ngx_http_scgi_module and ngx_http_uwsgi_module modules that may result in excessive memory allocation or an over-read of data. When scgi_pass or uwsgi_pass is configured, an unauthenticated attacker with man-in-the-middle (MITM) ability to control responses from an upstream server may be able to read the memory of the NGINX worker process or restart it. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| nginx | 26.04 LTS resolute |
Fixed 1.28.3-2ubuntu1.2
|
| 25.10 questing |
Fixed 1.28.0-6ubuntu1.4
|
|
| 24.04 LTS noble |
Fixed 1.24.0-2ubuntu7.9
|
|
| 22.04 LTS jammy |
Fixed 1.18.0-6ubuntu14.12
|
|
| 20.04 LTS focal |
Needs evaluation
|
|
| 18.04 LTS bionic |
Needs evaluation
|
|
| 16.04 LTS xenial |
Needs evaluation
|
|
| 14.04 LTS trusty |
Needs evaluation
|
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score |
6.5 · Medium
|
| Attack vector | Network |
| Attack complexity | High |
| Privileges required | None |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | High |
| Integrity impact | None |
| Availability impact | Low |
| Vector | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:L |
References
Related Ubuntu Security Notices (USN)
- USN-8354-1
- nginx vulnerabilities
- 1 June 2026
- USN-8375-1
- nginx vulnerabilities
- 3 June 2026