UBUNTU-CVE-2026-72889

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Source
https://ubuntu.com/security/CVE-2026-72889
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-72889.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-72889
Upstream
Published
2026-08-19T08:17:00Z
Modified
2026-09-02T16:26:09Z
Severity
  • 9.8 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

Net::OAuth versions before 0.33 for Perl allow the sender to choose the signature algorithm in verify. verify resolves the signature method class from the signature_method parameter of the incoming message. signature_method is required on every request, so the algorithm used to check a signature is chosen by whoever sent it, and nothing lets the verifying party pin the method instead. When a message names HMAC-SHA1 or HMAC-SHA256, the key is derived from consumer_secret and token_secret rather than from the key the provider deployed. A provider deployed on RSA-SHA1 holds only the consumer public key, and RFC 5849 does not use consumer_secret for that method, so the required parameter is filled with a placeholder. A client that names HMAC-SHA1 instead has its signature checked against that placeholder, so a guessable one is enough to forge requests for any consumer key and token.

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-2026-72889.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-2026-72889.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-2026-72889.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-2026-72889.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-2026-72889.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-2026-72889.json"