Signal is active with 1 mentions in latest observed window
Recommended action window: Monitor and triage in normal cycle
NVD description
Description NGINX JavaScript (njs) and QuickJS (qjs) engines have a vulnerability when a js_access handler performs asynchronous request body processing and an exception is thrown during asynchronous access-control evaluation before an explicit access denial is returned. An unauthenticated attacker can exploit this vulnerability by sending a crafted HTTP request that triggers an error condition in the access validation logic. This may cause the js_access phase to fail open, allowing the request to proceed instead of being denied, resulting in an authentication or authorization bypass and unauthorized access to protected resources. Impact This vulnerability may allow remote attackers to bypass js_access controls. There is no control plane exposure; this is a data plane issue only. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
Priority
LOW
Exploitation
NONE
PoC
NONE
Patch
AVAILABLE
Momentum
NONE
F5 njs access control fails open on an unhandled exception. Unauthenticated, no exploitation reported, fixed in njs 1.0.1. https://severitydaily.com/f5-njs-cve-2026-18329-js-access-fails-open-nginx-saml-oob-write/
Post summary
F5 NJS suffered an unauthenticated access control bug (CVE-2026-18329) caused by an unhandled exception; no exploitation reported and the issue is fixed in njs 1.0.1.