UBUNTU-CVE-2026-90473

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Source
https://ubuntu.com/security/CVE-2026-90473
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-90473.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-90473
Upstream
Published
2026-09-14T00:00:00Z
Modified
2026-09-14T11:18:27Z
Severity
  • 5.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N CVSS Calculator
  • 6.9 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

msgpack-java through 0.9.12 contains an integer overflow vulnerability in MessageUnpacker.skipValue() when processing MAP32 containers with large element counts. Attackers can supply a MAP32 element count at or above 0x40000000 that wraps when doubled, causing the parser cursor to desynchronize and attacker-controlled data to be returned in place of later fields.

References

Affected packages

Ubuntu:20.04:LTS / msgpack-java

Package

Name
msgpack-java
Purl
pkg:deb/ubuntu/msgpack-java?arch=source&distro=focal

Affected ranges

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

Affected versions

0.*
0.8.18-2
0.8.19-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libmsgpack-java",
            "binary_version": "0.8.19-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-90473.json"

Ubuntu:22.04:LTS / msgpack-java

Package

Name
msgpack-java
Purl
pkg:deb/ubuntu/msgpack-java?arch=source&distro=jammy

Affected ranges

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

Affected versions

0.*
0.8.22-2
0.9.0-1
0.9.0-2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libmsgpack-java",
            "binary_version": "0.9.0-2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-90473.json"

Ubuntu:24.04:LTS / msgpack-java

Package

Name
msgpack-java
Purl
pkg:deb/ubuntu/msgpack-java?arch=source&distro=noble

Affected ranges

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

Affected versions

0.*
0.9.5-1
0.9.6-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libmsgpack-java",
            "binary_version": "0.9.6-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-90473.json"

Ubuntu:26.04:LTS / msgpack-java

Package

Name
msgpack-java
Purl
pkg:deb/ubuntu/msgpack-java?arch=source&distro=resolute

Affected ranges

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

Affected versions

0.*
0.9.6-1
0.9.6-1build1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libmsgpack-java",
            "binary_version": "0.9.6-1build1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-90473.json"