DEBIAN-CVE-2026-48501
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.
DEBIAN-CVE-2026-48501
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: osv:DEBIAN-CVE-2026-48501
gh
Source reference: /affected/0/package/name
- Affected versions
- 2.23.0+dfsg1-1
Source reference:
/affected/0/versions2.24.3+dfsg1-1Source reference:
/affected/0/versions2.27.0+dfsg1-1Source reference:
/affected/0/versions2.30.0-1Source reference:
/affected/0/versions2.30.0-2Source reference:
/affected/0/versions2.35.0-1Source reference:
/affected/0/versions2.40.1+dfsg1-1Source reference:
/affected/0/versions2.42.1-1Source reference:
/affected/0/versions2.43.1-1Source reference:
/affected/0/versions2.44.1-1Source reference:
/affected/0/versions2.44.1-2Source reference:
/affected/0/versions2.45.0-1Source reference:
/affected/0/versions2.46.0-1Source reference:
/affected/0/versions2.46.0-2Source reference:
/affected/0/versions2.46.0-3Source reference:
/affected/0/versions2.46.0-4Source reference:
/affected/0/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
gh
Source reference: /affected/1/package/name
- Affected versions
- 2.46.0-3
Source reference:
/affected/1/versions2.46.0-4Source reference:
/affected/1/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "gh",
"purl": "pkg:deb/debian/gh?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"2.23.0+dfsg1-1",
"2.24.3+dfsg1-1",
"2.27.0+dfsg1-1",
"2.30.0-1",
"2.30.0-2",
"2.35.0-1",
"2.40.1+dfsg1-1",
"2.42.1-1",
"2.43.1-1",
"2.44.1-1",
"2.44.1-2",
"2.45.0-1",
"2.46.0-1",
"2.46.0-2",
"2.46.0-3",
"2.46.0-4"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-48501.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "gh",
"purl": "pkg:deb/debian/gh?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"2.46.0-3",
"2.46.0-4"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-48501.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
]Publisher severity
No explicit severity was provided.
- Event
- #57200 · Revision 1
- Added to Heist Feed
- Publisher date