UBUNTU-CVE-2026-72888

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Source
https://ubuntu.com/security/CVE-2026-72888
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-72888.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-72888
Upstream
Published
2026-08-16T14:16:00Z
Modified
2026-08-19T13:35:01Z
Severity
  • 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

Net::OAuth versions before 0.32 for Perl allow memory exhaustion via unbounded caching of failed module loads in smart_require. smart_require stores results in a process-global hash with no bound and no eviction, and keeps an entry for every class name it is asked about, including names that failed to load, because the return value of the failed eval is stored before the error is checked. The key comes off the wire on the server side: _signature_method_class builds the class name from the signature_method parameter of the incoming message, and verify resolves it before any signature is checked. A remote client chooses both how many entries are created and how long each key is. In a persistent server the hash grows for the life of the worker process until it exhausts memory. Header size limits bound the key length on the Authorization header path, but not on a POST body.

References

Affected packages

Ubuntu:16.04:LTS
libnet-oauth-perl

Package

Name
libnet-oauth-perl
Purl
pkg:deb/ubuntu/libnet-oauth-perl?arch=source&distro=xenial

Affected ranges

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

Affected versions

0.*
0.28-2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libnet-oauth-perl",
            "binary_version": "0.28-2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-72888.json"
Ubuntu:18.04:LTS
libnet-oauth-perl

Package

Name
libnet-oauth-perl
Purl
pkg:deb/ubuntu/libnet-oauth-perl?arch=source&distro=bionic

Affected ranges

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

Affected versions

0.*
0.28-2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libnet-oauth-perl",
            "binary_version": "0.28-2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-72888.json"
Ubuntu:20.04:LTS
libnet-oauth-perl

Package

Name
libnet-oauth-perl
Purl
pkg:deb/ubuntu/libnet-oauth-perl?arch=source&distro=focal

Affected ranges

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

Affected versions

0.*
0.28-3

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libnet-oauth-perl",
            "binary_version": "0.28-3"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-72888.json"
Ubuntu:22.04:LTS
libnet-oauth-perl

Package

Name
libnet-oauth-perl
Purl
pkg:deb/ubuntu/libnet-oauth-perl?arch=source&distro=jammy

Affected ranges

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

Affected versions

0.*
0.28-3

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libnet-oauth-perl",
            "binary_version": "0.28-3"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-72888.json"
Ubuntu:24.04:LTS
libnet-oauth-perl

Package

Name
libnet-oauth-perl
Purl
pkg:deb/ubuntu/libnet-oauth-perl?arch=source&distro=noble

Affected ranges

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

Affected versions

0.*
0.28-4

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libnet-oauth-perl",
            "binary_version": "0.28-4"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-72888.json"
Ubuntu:26.04:LTS
libnet-oauth-perl

Package

Name
libnet-oauth-perl
Purl
pkg:deb/ubuntu/libnet-oauth-perl?arch=source&distro=resolute

Affected ranges

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

Affected versions

0.*
0.31-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libnet-oauth-perl",
            "binary_version": "0.31-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-72888.json"