UBUNTU-CVE-2026-101917

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Source
https://ubuntu.com/security/CVE-2026-101917
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-101917.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-101917
Upstream
Published
2026-09-28T21:17:00Z
Modified
2026-09-30T21:41:53Z
Severity
  • 5.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

PyJWT is a Python implementation of JSON Web Token standards. Prior to 2.14.0, PyJWT get_signing_key_from_jwt is affected because unknown kid misses force refreshes without a negative cache or minimum refresh interval. This occurs when unauthenticated tokens repeatedly use the same unknown kid or varying kid values absent from the cached JWKS. As a result, each cache miss causes PyJWKClient to refresh the JWKS. Consequently, attacker traffic can amplify outbound requests to the configured JWKS endpoint. This issue is fixed in version 2.14.0.

References

Affected packages

Ubuntu:22.04:LTS
pyjwt

Package

Name
pyjwt
Purl
pkg:deb/ubuntu/pyjwt?arch=source&distro=jammy

Affected ranges

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

Affected versions

1.*
1.7.1-2ubuntu2
2.*
2.1.0-1
2.3.0-1
2.3.0-1ubuntu0.1
2.3.0-1ubuntu0.2
2.3.0-1ubuntu0.3
2.3.0-1ubuntu0.4

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "python3-jwt",
            "binary_version":  "2.3.0-1ubuntu0.4"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-101917.json"
Ubuntu:24.04:LTS
pyjwt

Package

Name
pyjwt
Purl
pkg:deb/ubuntu/pyjwt?arch=source&distro=noble

Affected ranges

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

Affected versions

2.*
2.7.0-1
2.7.0-1ubuntu0.1
2.7.0-1ubuntu0.2

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "python3-jwt",
            "binary_version":  "2.7.0-1ubuntu0.2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-101917.json"
Ubuntu:26.04:LTS
pyjwt

Package

Name
pyjwt
Purl
pkg:deb/ubuntu/pyjwt?arch=source&distro=resolute

Affected ranges

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

Affected versions

2.*
2.10.1-2
2.10.1-3
2.10.1-3build1
2.10.1-4
2.10.1-4ubuntu1
2.10.1-4ubuntu1.1

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "python3-jwt",
            "binary_version":  "2.10.1-4ubuntu1.1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-101917.json"
Ubuntu:Pro:16.04:LTS
pyjwt

Package

Name
pyjwt
Purl
pkg:deb/ubuntu/pyjwt?arch=source&distro=esm-infra-legacy%2Fxenial

Affected ranges

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

Affected versions

1.*
1.0.0-0ubuntu1
1.3.0-1
1.3.0-1ubuntu0.1
1.3.0-1ubuntu0.1+esm1
1.3.0-1ubuntu0.1+esm2

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "python-jwt",
            "binary_version":  "1.3.0-1ubuntu0.1+esm2"
        },
        {
            "binary_name":  "python3-jwt",
            "binary_version":  "1.3.0-1ubuntu0.1+esm2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-101917.json"
Ubuntu:Pro:18.04:LTS
pyjwt

Package

Name
pyjwt
Purl
pkg:deb/ubuntu/pyjwt?arch=source&distro=esm-infra%2Fbionic

Affected ranges

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

Affected versions

1.*
1.4.2-1.1
1.5.3+ds1-1
1.5.3+ds1-1ubuntu0.1
1.5.3+ds1-1ubuntu0.1+esm1
1.5.3+ds1-1ubuntu0.1+esm2

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "python-jwt",
            "binary_version":  "1.5.3+ds1-1ubuntu0.1+esm2"
        },
        {
            "binary_name":  "python3-jwt",
            "binary_version":  "1.5.3+ds1-1ubuntu0.1+esm2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-101917.json"
Ubuntu:Pro:20.04:LTS
pyjwt

Package

Name
pyjwt
Purl
pkg:deb/ubuntu/pyjwt?arch=source&distro=esm-infra%2Ffocal

Affected ranges

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

Affected versions

1.*
1.7.0-2
1.7.1-1
1.7.1-2ubuntu1
1.7.1-2ubuntu2
1.7.1-2ubuntu2.1
1.7.1-2ubuntu2.1+esm1
1.7.1-2ubuntu2.1+esm2

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "python3-jwt",
            "binary_version":  "1.7.1-2ubuntu2.1+esm2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-101917.json"