CVE-2026-48142
MEDIUM EPSS 31.7%
Published Jun 17, 20261w ago · Modified Jun 22, 20261w ago
6.3 CVSS 4.0
Published Jun 17, 2026 1w ago
Last Modified Jun 22, 2026 1w ago
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 Details
Base Score
Exploitability
Impact
Vector string
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
Privileges Required None
User Interaction None
Scope X
Threat Intelligence
EPSS Exploit Probability
31.7% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available
Weaknesses 1
CWE-125 Out-of-bounds Read Memory Safety
Affected Products 15
| Vendor | Product | Version | Range |
|---|---|---|---|
| f5 | dos | * | ≥4.3.0 – ≤4.7.0 |
| f5 | dos | 4.9.0 | any |
| f5 | nginx_gateway_fabric | * | ≥1.3.0 – ≤1.6.2 |
| f5 | nginx_gateway_fabric | * | ≥2.0.0 – ≤2.6.3 |
| f5 | nginx_ingress_controller | * | ≥3.5.0 – ≤3.7.2 |
| f5 | nginx_ingress_controller | * | ≥4.0.0 – ≤4.0.1 |
| f5 | nginx_ingress_controller | * | ≥5.0.0 – ≤5.5.0 |
| f5 | nginx_instance_manager | * | ≥2.17.0 – ≤2.22.0 |
| f5 | nginx_open_source | * | ≥1.0.0 – ≤1.30.2 |
| f5 | nginx_open_source | * | ≥1.31.0 – ≤1.31.1 |
| f5 | nginx_plus | * | ≥37.0.0 – ≤37.0.1 |
| f5 | nginx_plus | * | ≥r33 – ≤r36 |
| f5 | waf | * | ≥4.10.0 – ≤4.16.0 |
| f5 | waf | * | ≥5.2.0 – ≤5.8.0 |
| f5 | waf | * | ≥5.9.0 – ≤5.13.1 |
References 1
- my.f5.com https://my.f5.com/manage/s/article/K000161585
Remediation
No remediation data recorded yet
Check vendor advisories and the NVD entry for patch availability.