Source: nginx Version: 1.30.1-2 Severity: grave Tags: security upstream Justification: user security hole X-Debbugs-Cc: [email protected], Debian Security Team <[email protected]>
Hi, The following vulnerability was published for nginx. CVE-2026-9256[0]: | NGINX Plus and NGINX Open Source have a vulnerability in the | ngx_http_rewrite_module module. This vulnerability exists when a | rewrite directive uses a regex pattern with distinct, overlapping | Perl-Compatible Regular Expression (PCRE) captures (for example, | ^/((.*))$) and a replacement string that references multiple such | captures (for example, $1$2) in a redirect or arguments context. An | unauthenticated attacker along with conditions beyond their 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. If you fix the vulnerability please also make sure to include the CVE (Common Vulnerabilities & Exposures) id in your changelog entry. For further information see: [0] https://security-tracker.debian.org/tracker/CVE-2026-9256 https://www.cve.org/CVERecord?id=CVE-2026-9256 [1] https://github.com/nginx/nginx/commit/3f135ae2eb60ce376196c898a6c7cb4d774f7068 Please adjust the affected versions in the BTS as needed. Regards, Salvatore
