CVE Watch10 sept 2026

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 dire

CVSS

8.1

Alto

EPSS

68.0%

p99

KEV

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Exploit Today

0-100

Publicado: 13 may 2026 · Última mod.: 10 sept 2026 · CWE-122 · CWE-131

EPSS · 30d

3.4%EPSS · 30 días68.0%

2026-09-272026-10-25

Descripción técnica

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 code on systems with Address Space Layout Randomization (ASLR) disabled or when the attacker can bypass ASLR. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

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