UBUNTU-CVE-2026-2581

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Source
https://ubuntu.com/security/CVE-2026-2581
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-2581.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-2581
Upstream
Published
2026-03-12T21:16:00Z
Modified
2026-03-19T08:32:10.448898Z
Severity
  • 5.9 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

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.

References

Affected packages

Ubuntu:24.04:LTS / node-undici

Package

Name
node-undici
Purl
pkg:deb/ubuntu/node-undici@5.26.3+dfsg1+~cs23.10.12-2?arch=source&distro=noble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

5.*
5.22.1+dfsg1+~cs20.10.10.2-1ubuntu1
5.26.3+dfsg1+~cs23.10.12-2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "9.1.3~5.26.3+dfsg1+~cs23.10.12-2",
            "binary_name": "node-llhttp"
        },
        {
            "binary_version": "5.26.3+dfsg1+~cs23.10.12-2",
            "binary_name": "node-undici"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-2581.json"

Ubuntu:25.10 / node-undici

Package

Name
node-undici
Purl
pkg:deb/ubuntu/node-undici@7.3.0+dfsg1+~cs24.12.11-2?arch=source&distro=questing

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

7.*
7.3.0+dfsg1+~cs24.12.11-1
7.3.0+dfsg1+~cs24.12.11-2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "9.2.1~7.3.0+dfsg1+~cs24.12.11-2",
            "binary_name": "libllhttp-dev"
        },
        {
            "binary_version": "9.2.1~7.3.0+dfsg1+~cs24.12.11-2",
            "binary_name": "libllhttp9.2"
        },
        {
            "binary_version": "9.2.1~7.3.0+dfsg1+~cs24.12.11-2",
            "binary_name": "node-llhttp"
        },
        {
            "binary_version": "7.3.0+dfsg1+~cs24.12.11-2",
            "binary_name": "node-undici"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-2581.json"