Predictive Vulnerability Intelligence.

Product

  • Product
  • Pricing
  • Documentation

Company

  • About
  • Partnerships
  • Blog
  • Support

Legal

  • Terms
  • Privacy
  • Data Licensing

© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-2026-48142

26
FAUCET Score

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.

First published: Jun 17, 2026Last modified: Jun 17, 2026

Impacted Technologies

VendorProductVersion(s)CPE
>= 4.3.0, <= 4.7.0CPE matchmatch criteria
cpe:2.3:a:f5:dos:*:*:*:*:*:nginx:*:*
4.9.0CPE matchmatch criteria
cpe:2.3:a:f5:dos:4.9.0:*:*:*:*:nginx:*:*
>= 1.3.0, <= 1.6.2CPE matchmatch criteria
cpe:2.3:a:f5:nginx_gateway_fabric:*:*:*:*:*:*:*:*
>= 2.0.0, <= 2.6.3CPE matchmatch criteria
cpe:2.3:a:f5:nginx_gateway_fabric:*:*:*:*:*:*:*:*
>= 3.5.0, <= 3.7.2CPE matchmatch criteria
cpe:2.3:a:f5:nginx_ingress_controller:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 4.0

6.3MEDIUM

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/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

Attack Vector
NETWORK
Attack Complexity
HIGH
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
VS Confidentiality
LOW
VS Integrity
NONE
VS Availability
LOW
SS Confidentiality
NONE
SS Integrity
NONE
SS Availability
NONE
Exploit Maturity
NOT_DEFINED
CvssVersion
4.0

Exploit Intelligence

EPSS Score
0.68%
Probability of exploitation in next 30 days
EPSS Percentile
48.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0068 is in the 9th percentile among its peer group of 19,955 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (4)

microsoftpatch availablevia msrc
Product: azl3 nginx 1.28.3-5 on Azure Linux 3.0Fixed in: 1.28.3-6
microsoftpatch availablevia msrc
Product: azl3 nginx 1.28.3-6 on Azure Linux 3.0Fixed in: 1.28.3-6
microsoftpatch availablevia msrc
Product: 21497-17084Fixed in: 1.28.3-6
microsoftpatch availablevia msrc
Product: 21527-17084Fixed in: 1.28.3-6

Vendor Advisories (1)

microsoft2026-Jun/CVE-2026-48142Moderate

NGINX ngx_http_charset_module vulnerability

Jun 9, 2026

References

my.f5.com / manage/s/article/K000161585
Vendor Advisory