UBUNTU-CVE-2026-6733

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Source
https://ubuntu.com/security/CVE-2026-6733
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-6733.json
JSON Data
https://api.test.osv.dev/v1/vulns/UBUNTU-CVE-2026-6733
Upstream
Published
2026-06-17T18:18:00Z
Modified
2026-06-24T11:00:30.075293490Z
Severity
  • 3.7 (Low) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

Impact: Undici's HTTP/1.1 client is vulnerable to response queue poisoning on reused keep-alive sockets. An attacker-controlled upstream server can inject an unsolicited HTTP/1.1 response onto an idle socket after a request completes. When the client dispatches the next request on that socket, it associates the injected response with the new request, causing responses to be delivered to the wrong requests. This requires an attacker-controlled or compromised upstream HTTP/1.1 server and keep-alive connection reuse. Patches: Upgrade to undici v6.26.0, v7.28.0 or v8.5.0. Workarounds: Disable keep-alive connection reuse by setting keepAliveTimeout: 0 on the Client or Pool.

References

Affected packages

Ubuntu:24.04:LTS / node-undici

Package

Name
node-undici
Purl
pkg:deb/ubuntu/node-undici?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-2026-6733.json"

Ubuntu:25.10 / node-undici

Package

Name
node-undici
Purl
pkg:deb/ubuntu/node-undici?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": "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-2026-6733.json"

Ubuntu:26.04:LTS / node-undici

Package

Name
node-undici
Purl
pkg:deb/ubuntu/node-undici?arch=source&distro=resolute

Affected ranges

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

Affected versions

7.*
7.3.0+dfsg1+~cs24.12.11-2
7.16.0+dfsg+~cs3.2.0-2
7.18.2+dfsg+~cs3.2.0-1
7.18.2+dfsg+~cs3.2.0-1build1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "7.18.2+dfsg+~cs3.2.0-1build1",
            "binary_name": "node-undici"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-6733.json"