CVE-2026-8711

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Source
https://cve.org/CVERecord?id=CVE-2026-8711
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-8711.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-8711
Downstream
Published
2026-05-19T15:16:33.017Z
Modified
2026-07-08T08:13:53.027450278Z
Severity
  • 9.8 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Summary
[none]
Details

NGINX JavaScript has a vulnerability when the jsfetchproxy 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.

References

Affected packages

Git / github.com/nginx/njs

Affected ranges

Type
GIT
Repo
https://github.com/nginx/njs
Events
Introduced
927d38d8438e8b3b3db63af4d9f6324210fd5dab
Fixed
9ead4e71f74a27279f3212bdb6cadb0e86981a1b
Database specific 
{
    "cpe": "cpe:2.3:a:f5:njs:*:*:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "0.9.4"
        },
        {
            "fixed": "0.9.9"
        }
    ],
    "source": "CPE_RANGE"
}

Affected versions

0.*
0.9.4
0.9.5
0.9.6
0.9.7
0.9.8

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-8711.json"