# CVE-2026-42945

> NGINX Plus and NGINX Open Source have a vulnerability in the ngx_http_rewrite_module module. This vulnerability exists when the rewrite directive is followed by a rewrite, if, or set directive and an unnamed Perl-Compatible Regular Expression (PCRE) capture (for example, $1, $2) with a replacement string that includes a question mark (?). An unauthenticated attacker along with conditions beyond its control can exploit this vulnerability by sending crafted HTTP requests. This may cause a heap buffer overflow in the NGINX worker process leading to a restart. Additionally, attackers can execute c

- **CVSS:** 8.1 (HIGH)
- **EPSS:** 0.9%
- **CWE:** CWE-122

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-42945
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