CVE•Published 2026-05-13•Modified 2026-06-18•0 articles on news•5 live references•NVD data

CVE-2026-42946F5 · Dos

Vulnerability data via NVD (ingested)

CVSS v3.1

6.5

MEDIUM

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:L

EPSS percentile

Exploit Prediction Scoring System · top 44% of all CVEs

Weaknesses (CWE)

CWE-789Memory Allocation with Excessive Size Value CWE-823Use of Out-of-range Pointer Offset

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.

Timeline

Published 2026-05-13

Modified 2026-06-18

External references

NVD MITRE Exploit-DB GitHub PoC VulnCheck

Search for exposed instances

Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).

Shodan · vuln tag0 hosts

vuln:CVE-2026-42946

Hosts Shodan has explicitly fingerprinted as vulnerable.

Shodan · product

product:"F5 Dos"

All exposed F5 Dos instances — cross-reference with the CVE's affected-version range.

Shodan · banner/body mention

http.html:"Dos"

HTTP body or banner mentions "Dos" — catches deploys Shodan didn't identify as a product.

More intel sources (5)

Shodan report

vuln:CVE-2026-42946