ALPINE-CVE-2026-8711

ALPINE-CVE-2026-8711

This page contains facts from public vulnerability sources. Check the original advisory before updating.

NGINX JavaScript has a vulnerability when the js_fetch_proxy directive is configured with at least one client-controlled NGINX variable (for example, $http_*, $arg_*, $cookie_*) and a location invoking the ngx.fetch() operation from NGINX JavaScript. An unauthenticated attacker 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.

CVSS 9.8 · Critical · Fix available

Published

2026-05-19T15:16:33.017Z

Updated

2026-10-01T02:17:49.418166832Z

Stack: system · web

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