UBUNTU-CVE-2026-65627

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Source
https://ubuntu.com/security/CVE-2026-65627
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-65627.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-65627
Upstream
Published
2026-10-26T20:17:00Z
Modified
2026-10-28T20:17:48Z
Severity
  • 6.9 (Medium) CVSS_V4 - CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N CVSS Calculator
  • 6.9 (Medium) CVSS_V4 - CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

Improper Handling of Highly Compressed Data (Data Amplification) vulnerability in potatosalad jose (erlang-jose) allows a remote attacker to exhaust a node's memory with a small crafted JWE token. The jose_jwe_zip:uncompress/2 function in src/jwe/jose_jwe_zip.erl decompresses the DEFLATE-compressed plaintext of a JWE that carries the optional zip: DEF header by calling zlib:inflate/2 on the entire attacker-controlled stream, with no bound on the output size or the inflation ratio. Raw DEFLATE reaches ratios around 1000:1 on highly repetitive input, so a few-kilobyte token inflates to hundreds of megabytes or gigabytes in a single call. Decompression runs automatically during decryption through jose_jwe:block_decrypt/2 (JOSE.JWE.block_decrypt/2 in Elixir), before the recipient can inspect or reject the payload. With the common asymmetric key-management algorithms (RSA-OAEP, ECDH-ES) an attacker needs only the recipient's public key to craft such a token, so no authentication or secret material is required. A single small token can exhaust the node's memory and crash the BEAM, denying service to all users. This issue affects jose: from 1.0.0 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-2026-65627.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-2026-65627.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-2026-65627.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-2026-65627.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-2026-65627.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-2026-65627.json"