CVE-2026-42946

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 v3 vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:L

Weaknesses (CWE)

CWE-789, CWE-823

Threats tracking this CVE

• NGINX Rift — CVE-2026-42945 Heap Buffer Overflow in ngx_http_rewrite_module (CVSS v4 9.2 Critical, 18-Year-Old Pre-Auth RCE, Public PoC) — CRITICAL

References

• https://my.f5.com/manage/s/article/K000161027

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