CVE-2026-48142

Advisory lineage Upstream: 0 Downstream: 3
PUBLISHED
Published: 17 Jun 2026, 14:04
Last modified:17 Jun 2026, 15:42

Vulnerability Summary

Overall Risk (default)
medium
25/100
CVSS Score
6.3 MEDIUM
v4.0 (cve.org)
EPSS Score
0.37% LOW
0% probability 0.00%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

17 Jun 2026, 14:04
Published
Vulnerability first disclosed
17 Jun 2026, 15:42
Last Modified
Vulnerability information updated

Description

NGINX Plus and NGINX Open Source have a vulnerability in the ngx_http_charset_module module. When content is served or proxied through a location block with both source_charset utf-8; and a charset directive (for example, charset koi8-r;) configured, remote, unauthenticated attackers can send requests (in conjunction with conditions beyond their control) to cause a heap buffer over-read in the NGINX worker process, leading to limited disclosure of memory or a restart. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

CVSS Metrics

  • v4.0•MEDIUM•Score: 6.3CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N
  • v3.1•MEDIUM•Score: 4.8CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:L

EPSS Trends

Current EPSS score: 0.37%• Percentile: 28%

Techniques & Countermeasures

  • CWE-125•Out-of-bounds Read

    The product reads data past the end, or before the beginning, of the intended buffer.

Affected Systems

  • f5•nginx open source

    ≥ 1.13.10, < 1.31.2 | ≥ 1.30.0, < 1.30.3

  • f5•nginx plus

    ≥ 37.0, < 37.0.2.1 | ≥ R36, < R36 P6

References (1)