CVE-2026-78689 NGINX ngx_http_js_module vulnerablility

Description NGINX JavaScript njs has a vulnerability in the XML module's namespace prefix list parser, reachable through the xml.exclusiveC14n method. An unauthenticated remote attacker can trigger it when an affected NGINX configuration passes an externally controlled XML namespace prefix list t...

CVE-2026-78689

NGINX JavaScript (njs) contains a heap-based buffer overflow (CWE-122) in the XML module's namespace prefix list parser, reachable via the xml.exclusiveC14n() method. Both the njs and QuickJS (qjs) engines are affected. With njs, the out-of-bounds write corrupts adjacent objects and crashes the N...