CVE-2026-8711
Published: 19 May 2026
Summary
CVE-2026-8711 is a high-severity Heap-based Buffer Overflow (CWE-122) vulnerability. Its CVSS base score is 8.1 (High).
Operationally, ranked at the 39.9th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
NVD Description
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…
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by sending crafted HTTP requests. This may cause a heap buffer overflow in the NGINX worker process leading to a restart. Additionally, for systems with Address Space Layout Randomization (ASLR) disabled, code execution is possible. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
Deeper analysisAI
Automated synthesis unavailable for this CVE.
Details
- CWE(s)