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DEBIAN-CVE-2026-8711

Type: advisorySource: OSV1 source record

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.

Announced Source revision 1
Original source ↗

DEBIAN-CVE-2026-8711

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: osv:DEBIAN-CVE-2026-8711

libnginx-mod-js

Source reference: /affected/0/package/name

Affected versions
0.8.9-1

Source reference: /affected/0/versions

0.9.1-1

Source reference: /affected/0/versions

0.9.4-1

Source reference: /affected/0/versions

0.9.6-1

Source reference: /affected/0/versions

0.9.8-1

Source reference: /affected/0/versions

Fixed versions
0.9.9-1

Source reference: /affected/0/ranges

Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "0.9.9-1"
          }
        ]
      }
    ],
    "package": {
      "name": "libnginx-mod-js",
      "purl": "pkg:deb/debian/libnginx-mod-js?arch=source&distro=forky",
      "ecosystem": "Debian:14"
    },
    "versions": [
      "0.8.9-1",
      "0.9.1-1",
      "0.9.4-1",
      "0.9.6-1",
      "0.9.8-1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-8711.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  }
]

Publisher severity

No explicit severity was provided.

Event
#58494 · Revision 1
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Publisher date
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