UBUNTU-CVE-2025-61152

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Source

https://ubuntu.com/security/CVE-2025-61152

Import Source

https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-61152.json

JSON Data

https://api.osv.dev/v1/vulns/UBUNTU-CVE-2025-61152

Upstream

CVE-2025-61152

Published

2025-10-10T14:15:00Z

Modified

2025-12-05T11:57:06Z

Severity

6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N CVSS Calculator
Ubuntu - medium

Summary

[none]

Details

python-jose thru 3.3.0 allows JWT tokens with 'alg=none' to be decoded and accepted without any cryptographic signature verification. A malicious actor can craft a forged token with arbitrary claims (e.g., is_admin=true) and bypass authentication checks, leading to privilege escalation or unauthorized access in applications that rely on python-jose for token validation. This issue is exploitable unless developers explicitly reject 'alg=none' tokens, which is not enforced by the library. NOTE: all parties agree that the issue is not relevant because it only occurs in a "verify_signature": False situation.

References

Affected packages

Ubuntu:22.04:LTS / python-jose

Package

Name: python-jose
Purl: pkg:deb/ubuntu/python-jose@3.3.0+dfsg-1?arch=source&distro=jammy

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Affected versions

3.*

3.3.0+dfsg-1

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "python3-jose",
            "binary_version": "3.3.0+dfsg-1"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-61152.json"

Ubuntu:24.04:LTS / python-jose