UBUNTU-CVE-2026-79772

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Source
https://ubuntu.com/security/CVE-2026-79772
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-79772.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-79772
Upstream
Published
2026-08-25T16:17:00Z
Modified
2026-09-02T19:36:49.908098961Z
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

Nokogiri versions before 1.19.1 fail to check the return value from xmlC14NExecute in the canonicalize method, returning an empty string on failure instead of raising an exception. Attackers can exploit this to bypass signature validation in downstream SAML libraries by providing invalid canonicalized XML that is incorrectly accepted as valid.

References

Affected packages

Ubuntu:16.04:LTS
ruby-nokogiri

Package

Name
ruby-nokogiri
Purl
pkg:deb/ubuntu/ruby-nokogiri?arch=source&distro=xenial

Affected ranges

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

Affected versions

1.*
1.6.6.2+ds-2build2
1.6.6.3-1
1.6.7-1
1.6.7.1-1
1.6.7.2-3
1.6.7.2-3build1
1.6.7.2-3ubuntu0.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.6.7.2-3ubuntu0.1",
            "binary_name": "ruby-nokogiri"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-79772.json"
Ubuntu:18.04:LTS
ruby-nokogiri

Package

Name
ruby-nokogiri
Purl
pkg:deb/ubuntu/ruby-nokogiri?arch=source&distro=bionic

Affected ranges

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

Affected versions

1.*
1.8.0-1
1.8.1-1
1.8.1-1build1
1.8.2-1build1
1.8.2-1ubuntu0.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.8.2-1ubuntu0.1",
            "binary_name": "ruby-nokogiri"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-79772.json"
Ubuntu:24.04:LTS
ruby-nokogiri

Package

Name
ruby-nokogiri
Purl
pkg:deb/ubuntu/ruby-nokogiri?arch=source&distro=noble

Affected ranges

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

Affected versions

1.*
1.14.3+dfsg-2
1.16.2+dfsg-1
1.16.2+dfsg-1build1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.16.2+dfsg-1build1",
            "binary_name": "ruby-nokogiri"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-79772.json"
Ubuntu:26.04:LTS
ruby-nokogiri

Package

Name
ruby-nokogiri
Purl
pkg:deb/ubuntu/ruby-nokogiri?arch=source&distro=resolute

Affected ranges

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

Affected versions

1.*
1.18.2+dfsg-1build1
1.18.10+dfsg-2
1.18.10+dfsg-3

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.18.10+dfsg-3",
            "binary_name": "ruby-nokogiri"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-79772.json"
Ubuntu:Pro:14.04:LTS
ruby-nokogiri

Package

Name
ruby-nokogiri
Purl
pkg:deb/ubuntu/ruby-nokogiri?arch=source&distro=esm-infra-legacy%2Ftrusty

Affected ranges

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

Affected versions

1.*
1.5.9-2
1.5.9-3
1.6.0-1
1.6.1+ds-1
1.6.1+ds-1ubuntu0.1~esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.6.1+ds-1ubuntu0.1~esm1",
            "binary_name": "ruby-nokogiri"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-79772.json"
Ubuntu:Pro:20.04:LTS
ruby-nokogiri

Package

Name
ruby-nokogiri
Purl
pkg:deb/ubuntu/ruby-nokogiri?arch=source&distro=esm-apps%2Ffocal

Affected ranges

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

Affected versions

1.*
1.10.3+dfsg1-2
1.10.4+dfsg1-1
1.10.7+dfsg1-1
1.10.7+dfsg1-2
1.10.7+dfsg1-2build1
1.10.7+dfsg1-2ubuntu0.1~esm2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.10.7+dfsg1-2ubuntu0.1~esm2",
            "binary_name": "ruby-nokogiri"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-79772.json"
Ubuntu:Pro:22.04:LTS
ruby-nokogiri

Package

Name
ruby-nokogiri
Purl
pkg:deb/ubuntu/ruby-nokogiri?arch=source&distro=esm-apps%2Fjammy

Affected ranges

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

Affected versions

1.*
1.11.1+dfsg-2ubuntu1
1.11.7+dfsg-3
1.11.7+dfsg-3build1
1.13.1+dfsg-2
1.13.1+dfsg-2ubuntu0.1~esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.13.1+dfsg-2ubuntu0.1~esm1",
            "binary_name": "ruby-nokogiri"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-79772.json"