Vulnerability details
CVE-2026-42946
F5 NGINX Open SourceF5 NGINX Plus
NGINX ngx_http_scgi_module and ngx_http_uwsgi_module vulnerability
CVSS 4.0
8.3High
Official 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
| Score | Version | Source | Vector |
|---|---|---|---|
| 8.3High | 4.0 | CVEProject cvelistV5 (CNA) (f5) | CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:L/SC:N/SI:N/SA:N |
| 6.5Medium | 3.1 | CVEProject cvelistV5 (CNA) (f5) | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:L |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| F5 | NGINX Open Source | 0.8.42 ≤ v < 1.30.1 | CVEProject cvelistV5 (CNA) |
| F5 | NGINX Plus | R32 ≤ v < R32 P6 | CVEProject cvelistV5 (CNA) |
| F5 | NGINX Plus | R36 ≤ v < R36 P4 | CVEProject cvelistV5 (CNA) |
References and advisories
1- https://my.f5.com/manage/s/article/K000161027 vendor-advisorypatch
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Details
- Published
- 2026-05-13
- Last updated
- 2026-05-13
- State
- Published
- Assigner (CNA)
- f5
Exploit prediction (EPSS)
0.93%
Probability of exploitation in 30 days
60.8%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- No
- Exploitation
- None
- Technical impact
- Partial
Weaknesses (CWE)
- CWE-789Memory Allocation with Excessive Size Value
- CWE-823Use of Out-of-range Pointer Offset