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DEBIAN-CVE-2026-90711

Type: advisorySource: OSV1 source record

proxy-addr is a Node.js module that determines a request's client address behind trusted reverse proxies, and it backs Express req.ip and req.ips. In versions 1.1.0 through 2.0.7, a trust subnet written in IPv4-mapped IPv6 notation with an IPv4-sized prefix, such as ::ffff:10.0.0.0/8 instead of the correct ::ffff:10.0.0.0/104, is accepted without error but trusts every IPv4 address on the internet rather than the block it names. Because the socket peer then becomes trusted at hop 0, any unauthenticated client can supply an arbitrary X-Forwarded-For header and control the address the application reads, which defeats IP-based access control, rate limiting, geolocation, and audit logging. This is a fail-open regression introduced in version 1.1.0. The issue is fixed in proxy-addr 2.0.8, and users should upgrade to 2.0.8 or later. As a workaround, ensure any IPv4-mapped IPv6 trust subnet uses a prefix length of at least 97, or express the range in plain IPv4 notation.

Announced Source revision 1
Original source ↗

DEBIAN-CVE-2026-90711

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-2026-90711

node-proxy-addr

Source reference: /affected/0/package/name

Affected versions
2.0.7+~cs2.3.0-1

Source reference: /affected/0/versions

2.0.7+~cs2.3.7-1

Source reference: /affected/0/versions

2.0.8+~cs2.3.7-1

Source reference: /affected/0/versions

Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

node-proxy-addr

Source reference: /affected/1/package/name

Affected versions
2.0.7+~cs2.3.0-1

Source reference: /affected/1/versions

2.0.7+~cs2.3.7-1

Source reference: /affected/1/versions

2.0.8+~cs2.3.7-1

Source reference: /affected/1/versions

Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

node-proxy-addr

Source reference: /affected/2/package/name

Affected versions
2.0.7+~cs2.3.0-1

Source reference: /affected/2/versions

2.0.7+~cs2.3.7-1

Source reference: /affected/2/versions

Fixed versions
2.0.8+~cs2.3.7-1

Source reference: /affected/2/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"
          }
        ]
      }
    ],
    "package": {
      "name": "node-proxy-addr",
      "purl": "pkg:deb/debian/node-proxy-addr?arch=source&distro=bookworm",
      "ecosystem": "Debian:12"
    },
    "versions": [
      "2.0.7+~cs2.3.0-1",
      "2.0.7+~cs2.3.7-1",
      "2.0.8+~cs2.3.7-1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-90711.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          }
        ]
      }
    ],
    "package": {
      "name": "node-proxy-addr",
      "purl": "pkg:deb/debian/node-proxy-addr?arch=source&distro=trixie",
      "ecosystem": "Debian:13"
    },
    "versions": [
      "2.0.7+~cs2.3.0-1",
      "2.0.7+~cs2.3.7-1",
      "2.0.8+~cs2.3.7-1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-90711.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "2.0.8+~cs2.3.7-1"
          }
        ]
      }
    ],
    "package": {
      "name": "node-proxy-addr",
      "purl": "pkg:deb/debian/node-proxy-addr?arch=source&distro=forky",
      "ecosystem": "Debian:14"
    },
    "versions": [
      "2.0.7+~cs2.3.0-1",
      "2.0.7+~cs2.3.7-1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-90711.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  }
]

Publisher severity

No explicit severity was provided.

Event
#58555 · Revision 1
Added to Heist Feed
Publisher date
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