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
2026-08-20T00:00:00Z
Modified
2026-08-20T10:46:41.198455035Z
Severity
  • 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 signaturemethod parameter of the incoming message. signaturemethod 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 consumersecret and tokensecret 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
0Unknown 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
0Unknown 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
0Unknown 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
0Unknown 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
0Unknown 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
0Unknown 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"