CVE-2026-48142

medium F5
CVSS v3 Base Score
4.8
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:L
EPSS Score
0.7%
Exploitation probability in 30 days
Top 51% most likely to be exploited
Attack Characteristics
Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Confidentiality
Low
Integrity
None
Availability
Low
Published: June 17, 2026 (81 days ago)
Last Modified: August 11, 2026
Vendor: F5
Source: NVD

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.

CWE

CWE-125

Affected Products

f5 dosf5 nginx gateway fabricf5 nginx ingress controllerf5 nginx instance managerf5 nginx open sourcef5 nginx plusf5 waf

References

🔗 my.f5.com