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.
CVSS Score
9.2
EPSS Score
0.009
Published
2026-05-19
Nginx NJS v0.7.10 was discovered to contain a segmentation violation via the function njs_function_frame at src/njs_function.h.
CVSS Score
7.5
EPSS Score
0.007
Published
2023-04-09
Nginx NJS v0.7.10 was discovered to contain a segmentation violation via the function njs_dump_is_recursive at src/njs_vmcode.c.
CVSS Score
7.5
EPSS Score
0.007
Published
2023-04-09
Nginx NJS v0.7.10 was discovered to contain an illegal memcpy via the function njs_vmcode_return at src/njs_vmcode.c.
CVSS Score
7.5
EPSS Score
0.007
Published
2023-04-09
Nginx NJS v0.7.10 was discovered to contain a segmentation violation via the function njs_lvlhsh_find at src/njs_lvlhsh.c.
CVSS Score
7.5
EPSS Score
0.007
Published
2023-04-09
Buffer Overflow vulnerabilty found in Nginx NJS v.0feca92 allows a remote attacker to execute arbitrary code via the njs_module_read in the njs_module.c file.
CVSS Score
9.8
EPSS Score
0.013
Published
2023-04-04
Buffer Overflow found in Nginx NJS allows a remote attacker to execute arbitrary code via the njs_object_property parameter of the njs/njs_vm.c function.
CVSS Score
9.8
EPSS Score
0.013
Published
2023-04-04
Nginx NJS v0.7.2 to v0.7.4 was discovered to contain a segmentation violation via njs_scope_valid_value at njs_scope.h. NOTE: the vendor disputes the significance of this report because NJS does not operate on untrusted input.
CVSS Score
7.5
EPSS Score
0.008
Published
2022-10-28
Nginx NJS v0.7.4 was discovered to contain a segmentation violation in njs_promise_reaction_job. NOTE: the vendor disputes the significance of this report because NJS does not operate on untrusted input.
CVSS Score
7.5
EPSS Score
0.007
Published
2022-10-28
Nginx NJS v0.7.2 was discovered to contain a heap-use-after-free bug caused by illegal memory copy in the function njs_json_parse_iterator_call at njs_json.c.
CVSS Score
9.8
EPSS Score
0.009
Published
2022-10-28
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