Is CVE-2026-8711 actively exploited?

No active exploitation of CVE-2026-8711 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-8711 be exploited remotely?

Yes. CVE-2026-8711 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-8711?

CVE-2026-8711 has a CVSS score of 8.1 (HIGH).

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HIGH

CVE-2026-8711

CWE-122Published: May 19, 2026· Updated: May 21, 2026

8.1

CVSS v3.1

EPSS:0.18%probability of exploitation in 30 daysPercentile:39.9th

Official 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 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.

NVD Source

Technical Analysis

CVE-2026-8711 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 8.1.