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NGINX Open Source

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high threat

CVE-2026-42945: NGINX ngx_http_rewrite_module Heap Buffer Overflow

NGINX Plus and NGINX Open Source are vulnerable to a heap buffer overflow (CVE-2026-42945) due to crafted HTTP requests when the rewrite directive is followed by a rewrite, if, or set directive and an unnamed PCRE capture with a replacement string that includes a question mark, potentially leading to denial of service or code execution.

NGINX Plus +1 cve CVE-2026-42945 nginx heap overflow denial of service webserver
2r 3t 1c