UBUNTU-CVE-2026-1456

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Source
https://ubuntu.com/security/CVE-2026-1456
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-1456.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-1456
Upstream
Published
2026-02-11T12:16:00Z
Modified
2026-02-18T17:31:18Z
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
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.7 before 18.7.4, and 18.8 before 18.8.4 that could have allowed an unauthenticated user to cause denial of service through CPU exhaustion by submitting specially crafted markdown files that trigger exponential processing in markdown preview.

References

Affected packages

Ubuntu:16.04:LTS / gitlab

Package

Name
gitlab
Purl
pkg:deb/ubuntu/gitlab@8.5.8+dfsg-5?arch=source&distro=xenial

Affected ranges

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

Affected versions

8.*
8.4.3+dfsg-9
8.4.3+dfsg-12
8.5.8+dfsg-5

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "8.5.8+dfsg-5",
            "binary_name": "gitlab"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-1456.json"

Ubuntu:24.04:LTS / gitlab-agent

Package

Name
gitlab-agent
Purl
pkg:deb/ubuntu/gitlab-agent@16.1.3-2?arch=source&distro=noble

Affected ranges

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

Affected versions

14.*
14.1.0-1
16.*
16.1.3-2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "16.1.3-2",
            "binary_name": "ruby-kas-grpc"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-1456.json"

Ubuntu:25.10 / gitlab-agent

Package

Name
gitlab-agent
Purl
pkg:deb/ubuntu/gitlab-agent@16.1.3-2?arch=source&distro=questing

Affected ranges

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

Affected versions

16.*
16.1.3-2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "16.1.3-2",
            "binary_name": "ruby-kas-grpc"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-1456.json"