UBUNTU-CVE-2026-119284

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Source
https://ubuntu.com/security/CVE-2026-119284
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-119284.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-119284
Upstream
Published
2026-10-30T00:00:00Z
Modified
2026-10-31T03:30:03Z
Severity
  • 6.9 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

joserfc is a Python library that provides an implementation of several JSON Object Signing and Encryption (JOSE) standards. Prior to 1.7.6, joserfc compact JWS deserialization calls bytes.split() before enforcing the existing aggregate segment-size limits. When attacker-controlled compact serialization bytes reach deserialize_compact(), the split creates copies of the header, payload, and signature segments before ExceededSizeError rejects them, causing an additional allocation approximately proportional to the supplied token. Requests that exhaust available process memory can therefore cause an availability failure even though signature verification fails. This issue is fixed in version 1.7.6.

References

Affected packages

Ubuntu:26.10 / joserfc

Package

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

Affected ranges

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

Affected versions

1.*
1.6.2-1
1.6.5-1
1.6.8-1
1.7.0-1
1.7.1-1
1.7.2-1
1.7.4-1

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "python3-joserfc",
            "binary_version":  "1.7.4-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-119284.json"

Ubuntu:26.04:LTS / joserfc

Package

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

Affected ranges

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

Affected versions

1.*
1.2.2-1
1.4.0-1
1.4.1-1
1.4.3-1
1.5.0-1
1.6.2-1

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "python3-joserfc",
            "binary_version":  "1.6.2-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-119284.json"