UBUNTU-CVE-2026-65629

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Source
https://ubuntu.com/security/CVE-2026-65629
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-65629.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-65629
Upstream
Published
2026-10-26T20:17:00Z
Modified
2026-10-28T20:17:35Z
Severity
  • 7.4 (High) CVSS_V4 - CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N CVSS Calculator
  • 7.4 (High) CVSS_V4 - CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

Use of Password Hash With Insufficient Computational Effort in the jose library allows an attacker who obtains a password-encrypted private-key export to recover the private key through an offline password-cracking attack. When jose exports a password-encrypted private key with jose_jwk:to_der/2 (JOSE.JWK.to_der/2), the jose_jwk_der:to_binary/3 function in src/jwk/jose_jwk_der.erl serializes the key as a PKCS#8 EncryptedPrivateKeyInfo using the PBES2 scheme with hardcoded key-derivation parameters: PBKDF2-HMAC-SHA256 with an iteration count of 2048 and an 8-byte (64-bit) random salt. Neither value can be overridden by the caller. Both values are far below current guidance (OWASP recommends on the order of 600,000 iterations for PBKDF2-HMAC-SHA256, and NIST recommends salts of at least 128 bits), so the key-stretching work factor is roughly 300 times lower than intended and the short salt reduces the cost of precomputation across keys. The symmetric encryption (AES-256-CBC with a 16-byte random IV) is not affected; the weakness is entirely in the derivation strength. An attacker who obtains one of these exported blobs (for example from a backup, configuration repository, object storage, or logs) can mount a cheap offline dictionary or brute-force attack against the export password, and success yields the full private key. This issue affects jose: from 1.10.0 before 1.11.13.

References

Affected packages

Ubuntu:18.04:LTS
jose

Package

Name
jose
Purl
pkg:deb/ubuntu/jose?arch=source&distro=bionic

Affected ranges

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

Affected versions

Other
10-2
10-2build1

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "jose",
            "binary_version":  "10-2build1"
        },
        {
            "binary_name":  "libjose0",
            "binary_version":  "10-2build1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-65629.json"
Ubuntu:20.04:LTS
jose

Package

Name
jose
Purl
pkg:deb/ubuntu/jose?arch=source&distro=focal

Affected ranges

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

Affected versions

Other
10-2build2

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "jose",
            "binary_version":  "10-2build2"
        },
        {
            "binary_name":  "libjose0",
            "binary_version":  "10-2build2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-65629.json"
Ubuntu:22.04:LTS
jose

Package

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

Affected ranges

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

Affected versions

Other
10-3
11-2

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "jose",
            "binary_version":  "11-2"
        },
        {
            "binary_name":  "libjose0",
            "binary_version":  "11-2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-65629.json"
Ubuntu:24.04:LTS
jose

Package

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

Affected ranges

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

Affected versions

Other
11-2
11-3
11-3build1
11-3build2
13-1

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "jose",
            "binary_version":  "13-1"
        },
        {
            "binary_name":  "libjose0",
            "binary_version":  "13-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-65629.json"
Ubuntu:26.04:LTS
jose

Package

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

Affected ranges

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

Affected versions

Other
14-2build1

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "jose",
            "binary_version":  "14-2build1"
        },
        {
            "binary_name":  "libjose0",
            "binary_version":  "14-2build1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-65629.json"
Ubuntu:26.10
jose

Package

Name
jose
Purl
pkg:deb/ubuntu/jose?arch=source&distro=stonking

Affected ranges

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

Affected versions

Other
14-2build1
14-2build2

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "jose",
            "binary_version":  "14-2build2"
        },
        {
            "binary_name":  "libjose0",
            "binary_version":  "14-2build2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-65629.json"