CVE-2026-48142
Description
A flaw was found in NGINX. Remote, unauthenticated attackers can exploit a vulnerability in the ngx_http_charset_module when specific charset configurations are present. This can lead to a heap buffer over-read, potentially causing limited disclosure of memory or a denial of service by restarting the NGINX worker process.
Mitigation
To mitigate this issue, avoid configuring NGINX with both `source_charset utf-8;` and an additional `charset` directive within the same location block in the `ngx_http_charset_module`. If these directives are not essential for your NGINX deployment, removing one or both will prevent the vulnerability from being exploited. After modifying the NGINX configuration, reload the NGINX service using `systemctl reload nginx`. This action may temporarily interrupt active connections.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 4.8 | N/A | 4.8 |
| Attack Vector | Network | N/A | Network |
| Attack Complexity | High | N/A | High |
| Privileges Required | None | N/A | None |
| User Interaction | None | N/A | None |
| Scope | Unchanged | N/A | Unchanged |
| Confidentiality | Low | N/A | Low |
| Integrity Impact | None | N/A | None |
| Availability Impact | Low | N/A | Low |
Vector
Red Hat: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:L
cve.org: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:L
Frequently Asked Questions
Not sure what something means? Check out our Security Glossary.
Want to get errata notifications? Sign up here.
