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2 vulnerabilities found for NGINX JavaScript by F5

CVE-2026-8711 (GCVE-0-2026-8711)

Vulnerability from nvd – Published: 2026-05-19 14:04 – Updated: 2026-05-20 03:55 X_F5
VLAI?
Title
NGINX JavaScript vulnerability
Summary
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, 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.
Severity ?
8.1 (High)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
9.2 (Critical)
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CWE
  • CWE-122 - Heap-based Buffer Overflow
Assigner
f5
References
Impacted products
Vendor Product Version
F5 NGINX JavaScript Affected: 0.9.4 , < 0.9.9 (custom)
Create a notification for this product.
Date Public ?
2026-05-19 14:00
Credits
"F5 acknowledges udolemi (S2W) for bringing this issue to our attention and following the highest standards of coordinated disclosure."
Show details on NVD website
To clipboard 

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CVE-2026-8711 (GCVE-0-2026-8711)

Vulnerability from cvelistv5 – Published: 2026-05-19 14:04 – Updated: 2026-05-20 03:55 X_F5
VLAI?
Title
NGINX JavaScript vulnerability
Summary
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, 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.
Severity ?
8.1 (High)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
9.2 (Critical)
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CWE
  • CWE-122 - Heap-based Buffer Overflow
Assigner
f5
References
Impacted products
Vendor Product Version
F5 NGINX JavaScript Affected: 0.9.4 , < 0.9.9 (custom)
Create a notification for this product.
Date Public ?
2026-05-19 14:00
Credits
"F5 acknowledges udolemi (S2W) for bringing this issue to our attention and following the highest standards of coordinated disclosure."
Show details on NVD website
To clipboard 

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