CVE-2026-42946
Analyzed
Analyzed - Analysis Complete
BaseFortify
Vulnerability report for CVE-2026-42946, including description, CVSS score, EPSS score, affected products, exploitability, helpful resources, and attack-flow context.
Publication date: 2026-05-13
Last updated on: 2026-06-18
Assigner: F5 Networks
Description
Description
A vulnerability exists in the ngx_http_scgi_module and ngx_http_uwsgi_module modules that may result in excessive memory allocation or an over-read of data. When scgi_pass or uwsgi_pass is configured, an unauthenticated attacker with man-in-the-middle (MITM) ability to control responses from an upstream server may be able to read the memory of the NGINX worker process or restart it. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
CVSS Scores
EPSS Scores
| Probability: | |
| Percentile: |
Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| f5 | nginx_ingress_controller | From 4.0.0 (inc) to 4.0.1 (inc) |
| f5 | nginx_gateway_fabric | From 1.3.0 (inc) to 1.6.2 (inc) |
| f5 | nginx_gateway_fabric | From 2.0.0 (inc) to 2.6.0 (inc) |
| f5 | nginx_ingress_controller | From 3.5.0 (inc) to 3.7.2 (inc) |
| f5 | nginx_ingress_controller | From 5.0.0 (inc) to 5.4.2 (inc) |
| f5 | nginx_instance_manager | From 2.16.0 (inc) to 2.22.0 (inc) |
| f5 | nginx_open_source | From 0.8.42 (inc) to 0.9.7 (inc) |
| f5 | nginx_open_source | From 1.0.0 (inc) to 1.30.0 (inc) |
| f5 | nginx_plus | From r32 (inc) to r36 (inc) |
| f5 | dos | 4.8.0 |
| f5 | waf | From 5.9.0 (inc) to 5.12.1 (inc) |
| f5 | dos | From 4.3.0 (inc) to 4.7.0 (inc) |
| f5 | waf | From 5.1.0 (inc) to 5.8.0 (inc) |
| f5 | waf | From 4.9.0 (inc) to 4.16.0 (inc) |
Helpful Resources
Exploitability
CWE
KEV
| CWE ID | Description |
|---|---|
| CWE-789 | The product allocates memory based on an untrusted, large size value, but it does not ensure that the size is within expected limits, allowing arbitrary amounts of memory to be allocated. |
| CWE-823 | The product performs pointer arithmetic on a valid pointer, but it uses an offset that can point outside of the intended range of valid memory locations for the resulting pointer. |
