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DEBIAN-CVE-2026-2581

Type: advisorySource: OSV1 source record

This is an uncontrolled resource consumption vulnerability (CWE-400) that can lead to Denial of Service (DoS). In vulnerable Undici versions, when interceptors.deduplicate() is enabled, response data for deduplicated requests could be accumulated in memory for downstream handlers. An attacker-controlled or untrusted upstream endpoint can exploit this with large/chunked responses and concurrent identical requests, causing high memory usage and potential OOM process termination. Impacted users are applications that use Undici’s deduplication interceptor against endpoints that may produce large or long-lived response bodies. PatchesThe issue has been patched by changing deduplication behavior to stream response chunks to downstream handlers as they arrive (instead of full-body accumulation), and by preventing late deduplication when body streaming has already started. Users should upgrade to the first official Undici (and Node.js, where applicable) releases that include this patch.

Announced Group revision 1
Original source ↗

DEBIAN-CVE-2026-2581

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-2026-2581

node-undici

Source reference: /affected/0/package/name

Affected versions
7.15.0+dfsg+~cs3.2.0-1

Source reference: /affected/0/versions

7.15.0+dfsg+~cs3.2.0-3

Source reference: /affected/0/versions

7.16.0+dfsg+~cs3.2.0-1

Source reference: /affected/0/versions

7.16.0+dfsg+~cs3.2.0-2

Source reference: /affected/0/versions

7.18.2+dfsg+~cs3.2.0-1

Source reference: /affected/0/versions

7.24.5+dfsg+~cs3.2.0-1

Source reference: /affected/0/versions

7.24.6+dfsg+~cs3.2.0-1

Source reference: /affected/0/versions

7.24.6+dfsg+~cs3.2.0-2

Source reference: /affected/0/versions

7.24.6+dfsg+~cs3.2.0-3

Source reference: /affected/0/versions

7.3.0+dfsg1+~cs24.12.11-1

Source reference: /affected/0/versions

7.3.0+dfsg1+~cs24.12.11-2

Source reference: /affected/0/versions

8.10.2+dfsg+~cs3.2.2-1

Source reference: /affected/0/versions

8.5.0+dfsg+~cs3.2.0-1

Source reference: /affected/0/versions

8.5.0+dfsg+~cs3.2.0-2

Source reference: /affected/0/versions

8.5.0+dfsg+~cs3.2.0-3

Source reference: /affected/0/versions

8.9.0+dfsg+~cs3.2.0-1

Source reference: /affected/0/versions

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

node-undici

Source reference: /affected/1/package/name

Affected versions
7.15.0+dfsg+~cs3.2.0-1

Source reference: /affected/1/versions

7.15.0+dfsg+~cs3.2.0-3

Source reference: /affected/1/versions

7.16.0+dfsg+~cs3.2.0-1

Source reference: /affected/1/versions

7.16.0+dfsg+~cs3.2.0-2

Source reference: /affected/1/versions

7.18.2+dfsg+~cs3.2.0-1

Source reference: /affected/1/versions

7.3.0+dfsg1+~cs24.12.11-1

Source reference: /affected/1/versions

7.3.0+dfsg1+~cs24.12.11-2

Source reference: /affected/1/versions

Fixed versions
7.24.5+dfsg+~cs3.2.0-1

Source reference: /affected/1/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-undici",
      "purl": "pkg:deb/debian/node-undici?arch=source&distro=trixie",
      "ecosystem": "Debian:13"
    },
    "versions": [
      "7.15.0+dfsg+~cs3.2.0-1",
      "7.15.0+dfsg+~cs3.2.0-3",
      "7.16.0+dfsg+~cs3.2.0-1",
      "7.16.0+dfsg+~cs3.2.0-2",
      "7.18.2+dfsg+~cs3.2.0-1",
      "7.24.5+dfsg+~cs3.2.0-1",
      "7.24.6+dfsg+~cs3.2.0-1",
      "7.24.6+dfsg+~cs3.2.0-2",
      "7.24.6+dfsg+~cs3.2.0-3",
      "7.3.0+dfsg1+~cs24.12.11-1",
      "7.3.0+dfsg1+~cs24.12.11-2",
      "8.10.2+dfsg+~cs3.2.2-1",
      "8.5.0+dfsg+~cs3.2.0-1",
      "8.5.0+dfsg+~cs3.2.0-2",
      "8.5.0+dfsg+~cs3.2.0-3",
      "8.9.0+dfsg+~cs3.2.0-1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-2581.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "7.24.5+dfsg+~cs3.2.0-1"
          }
        ]
      }
    ],
    "package": {
      "name": "node-undici",
      "purl": "pkg:deb/debian/node-undici?arch=source&distro=forky",
      "ecosystem": "Debian:14"
    },
    "versions": [
      "7.15.0+dfsg+~cs3.2.0-1",
      "7.15.0+dfsg+~cs3.2.0-3",
      "7.16.0+dfsg+~cs3.2.0-1",
      "7.16.0+dfsg+~cs3.2.0-2",
      "7.18.2+dfsg+~cs3.2.0-1",
      "7.3.0+dfsg1+~cs24.12.11-1",
      "7.3.0+dfsg1+~cs24.12.11-2"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-2581.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  }
]

Publisher severity

No explicit severity was provided.

Event
#56244 · Revision 1
Added to Heist Feed
Publisher date
Read the original announcement

Revision history

  1. DEBIAN-CVE-2026-2581 · Revision 1Source updated