UBUNTU-CVE-2026-118669

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Source
https://ubuntu.com/security/CVE-2026-118669
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-118669.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-118669
Upstream
Published
2026-10-30T00:00:00Z
Modified
2026-10-31T03:30:07Z
Severity
  • 8.4 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:H/SI:H/SA:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

OAuthLib is an implementation of the OAuth request-signing logic for Python 3.6+. Prior to 4.0.0, the client_credentials and Resource Owner Password Credentials token grant handlers can authenticate request.client as one confidential client while retaining an attacker-supplied request.client_id for validate_grant_type and validate_scopes. A lower-privilege authenticated client can therefore cause grant and scope authorization to use another client's identity when an application validator relies on the documented client_id argument, potentially issuing tokens with unauthorized grants or scopes. Validators that authorize exclusively from request.client may not be affected. This issue is fixed in version 4.0.0.

References

Affected packages

Ubuntu:16.04:LTS
python-oauthlib

Package

Name
python-oauthlib
Purl
pkg:deb/ubuntu/python-oauthlib?arch=source&distro=xenial

Affected ranges

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

Affected versions

1.*
1.0.0-1
1.0.3-1

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "python-oauthlib",
            "binary_version":  "1.0.3-1"
        },
        {
            "binary_name":  "python3-oauthlib",
            "binary_version":  "1.0.3-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-118669.json"
Ubuntu:18.04:LTS
python-oauthlib

Package

Name
python-oauthlib
Purl
pkg:deb/ubuntu/python-oauthlib?arch=source&distro=bionic

Affected ranges

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

Affected versions

2.*
2.0.1-1
2.0.4-1
2.0.6-1

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "python-oauthlib",
            "binary_version":  "2.0.6-1"
        },
        {
            "binary_name":  "python3-oauthlib",
            "binary_version":  "2.0.6-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-118669.json"
Ubuntu:20.04:LTS
python-oauthlib

Package

Name
python-oauthlib
Purl
pkg:deb/ubuntu/python-oauthlib?arch=source&distro=focal

Affected ranges

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

Affected versions

2.*
2.1.0-1
3.*
3.1.0-1ubuntu1
3.1.0-1ubuntu2

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "python3-oauthlib",
            "binary_version":  "3.1.0-1ubuntu2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-118669.json"
Ubuntu:22.04:LTS
python-oauthlib

Package

Name
python-oauthlib
Purl
pkg:deb/ubuntu/python-oauthlib?arch=source&distro=jammy

Affected ranges

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

Affected versions

3.*
3.1.0-2
3.1.1-1
3.2.0-1
3.2.0-1ubuntu0.1

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "python3-oauthlib",
            "binary_version":  "3.2.0-1ubuntu0.1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-118669.json"
Ubuntu:24.04:LTS
python-oauthlib

Package

Name
python-oauthlib
Purl
pkg:deb/ubuntu/python-oauthlib?arch=source&distro=noble

Affected ranges

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

Affected versions

3.*
3.2.2-1

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "python3-oauthlib",
            "binary_version":  "3.2.2-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-118669.json"
Ubuntu:26.04:LTS
python-oauthlib

Package

Name
python-oauthlib
Purl
pkg:deb/ubuntu/python-oauthlib?arch=source&distro=resolute

Affected ranges

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

Affected versions

3.*
3.2.2-3
3.3.1-1
3.3.1-1build1

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "python3-oauthlib",
            "binary_version":  "3.3.1-1build1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-118669.json"
Ubuntu:26.10
python-oauthlib

Package

Name
python-oauthlib
Purl
pkg:deb/ubuntu/python-oauthlib?arch=source&distro=stonking

Affected ranges

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

Affected versions

3.*
3.3.1-1build1
3.3.1-2

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "python3-oauthlib",
            "binary_version":  "3.3.1-2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-118669.json"