NVD

CVE-2026-48142 Detail

Awaiting Enrichment

This CVE record has been marked for NVD enrichment efforts.

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.

Metrics

NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.

CVSS 4.0 Severity and Vector Strings:

NIST: NVD

N/A

NVD assessment not yet provided.

Nist CVSS score does not match with CNA score

CNA: F5 Networks

CVSS-B 6.3 MEDIUM

Vector: CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N

CVSS 3.x Severity and Vector Strings:

CNA: F5 Networks

Base Score: 4.8 MEDIUM

Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:L

CVSS 2.0 Severity and Vector Strings:

National Institute of Standards and Technology

NIST: NVD

Base Score: N/A

NVD assessment not yet provided.

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URL	Source(s)	Tag(s)
https://my.f5.com/manage/s/article/K000161585	F5 Networks

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-125	Out-of-bounds Read	F5 Networks

Change History

2 change records found show changes

New CVE Received from F5 Networks 6/17/2026 11:16:59 AM

Action	Type	New Value
Added	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.
Added	CVSS V4.0	AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Added	CVSS V3.1	AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:L
Added	CWE	CWE-125
Added	Reference	https://my.f5.com/manage/s/article/K000161585
Added	Affected	[{"vendor":"F5","product":"NGINX Open Source","defaultStatus":"unknown","modules":["ngx_http_charset_module"],"versions":[{"version":"1.13.10","lessThan":"1.31.2","versionType":"custom","status":"affected"},{"version":"1.30.0","lessThan":"1.30.3","versionType":"custom","status":"affected"}]},{"vendor":"F5","product":"NGINX Plus","defaultStatus":"unaffected","modules":["ngx_http_charset_module"],"versions":[{"version":"37.0","lessThan":"37.0.2.1","versionType":"custom","status":"affected"},{"version":"R36","lessThan":"R36 P6","versionType":"custom","status":"affected"}]}]

Quick Info

CVE Dictionary Entry:
CVE-2026-48142
NVD Published Date:
06/17/2026
NVD Last Modified:
06/17/2026
Source:
F5 Networks

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Information Technology Laboratory

National Vulnerability Database