UBUNTU-CVE-2026-48501

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Source
https://ubuntu.com/security/CVE-2026-48501
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-48501.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-48501
Upstream
Withdrawn
2026-06-16T19:55:57Z
Published
2026-05-29T16:16:00Z
Modified
2026-06-16T21:45:14Z
Severity
  • 7.4 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N CVSS Calculator
  • 9.1 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

GitHub CLI (gh) is GitHub’s official command line tool. Prior to 2.93.0, GitHub CLI incorrectly includes authorization header in API requests to TUF repository mirrors via gh attestation, gh release verify, and gh release verify-asset commands. The CLI uses a shared HTTP client with an authentication layer that automatically attaches tokens to outgoing requests. This layer lacks accurate host detection and can incorrectly attribute the target host, providing it with a token it should never receive. Specifically, the host normalization logic collapses any *.github.com subdomain to github.com, so a request to tuf-repo.github.com (a GitHub Pages site, not a GitHub API endpoint) is treated as a request to github.com and receives the user's github.com token. For hosts that don't match github.com or a known GHES instance at all, the resolver falls back to GH_ENTERPRISE_TOKEN if set. The gh attestation, gh release verify and gh release verify-asset commands fetch data from several external hosts as part of their normal operation (TUF metadata from tuf-repo.github.com and tuf-repo-cdn.sigstore.dev, artifact bundles from Azure Blob Storage). Because these requests go through the same authenticated HTTP client, the token is sent to all of them. This vulnerability is fixed in 2.93.0.

References

Affected packages

Ubuntu:24.04:LTS
golang-github-cli-go-gh

Package

Name
golang-github-cli-go-gh
Purl
pkg:deb/ubuntu/golang-github-cli-go-gh?arch=source&distro=noble

Affected ranges

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

Affected versions

1.*
1.2.1-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "golang-github-cli-go-gh-dev",
            "binary_version": "1.2.1-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-48501.json"
Ubuntu:25.10
golang-github-cli-go-gh

Package

Name
golang-github-cli-go-gh
Purl
pkg:deb/ubuntu/golang-github-cli-go-gh?arch=source&distro=questing

Affected ranges

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

Affected versions

1.*
1.2.1-2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "golang-github-cli-go-gh-dev",
            "binary_version": "1.2.1-2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-48501.json"
golang-github-cli-go-gh-v2

Package

Name
golang-github-cli-go-gh-v2
Purl
pkg:deb/ubuntu/golang-github-cli-go-gh-v2?arch=source&distro=questing

Affected ranges

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

Affected versions

2.*
2.6.0-2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "golang-github-cli-go-gh-v2-dev",
            "binary_version": "2.6.0-2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-48501.json"
Ubuntu:26.04:LTS
golang-github-cli-go-gh

Package

Name
golang-github-cli-go-gh
Purl
pkg:deb/ubuntu/golang-github-cli-go-gh?arch=source&distro=resolute

Affected ranges

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

Affected versions

1.*
1.2.1-2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "golang-github-cli-go-gh-dev",
            "binary_version": "1.2.1-2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-48501.json"
golang-github-cli-go-gh-v2

Package

Name
golang-github-cli-go-gh-v2
Purl
pkg:deb/ubuntu/golang-github-cli-go-gh-v2?arch=source&distro=resolute

Affected ranges

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

Affected versions

2.*
2.6.0-2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "golang-github-cli-go-gh-v2-dev",
            "binary_version": "2.6.0-2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-48501.json"
Ubuntu:Pro:24.04:LTS
golang-github-cli-go-gh-v2

Package

Name
golang-github-cli-go-gh-v2
Purl
pkg:deb/ubuntu/golang-github-cli-go-gh-v2?arch=source&distro=esm-apps%2Fnoble

Affected ranges

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

Affected versions

2.*
2.0.0-2
2.3.0-1
2.4.0+git20231120.d32c104-1
2.5.0-1
2.6.0-1
2.6.0-1ubuntu0.24.04.1~esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "golang-github-cli-go-gh-v2-dev",
            "binary_version": "2.6.0-1ubuntu0.24.04.1~esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-48501.json"