DEBIAN-CVE-2026-44309
Gitsign is a keyless Sigstore to signing tool for Git commits with your a GitHub / OIDC identity. Prior to 0.16.0, gitsign verify and gitsign verify-tag re-encode commit/tag objects through go-git's EncodeWithoutSignature before checking the signature, instead of verifying against the raw git object bytes. For malformed objects with duplicate tree headers, git-core and go-git parse different trees: git-core uses the first, go-git uses the second. A signature crafted over the go-git-normalized form (second tree) passes gitsign verify while git-core resolves the commit to a completely different tree. This breaks the invariant that a verified signature, the commit semantics git-core presents to users, and the object hash logged in Rekor all refer to the same content. This vulnerability is fixed in 0.16.0.
DEBIAN-CVE-2026-44309
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-2026-44309
gitsign
Source reference: /affected/0/package/name
- Affected versions
- 0.13.0-2
Source reference:
/affected/0/versions0.13.0-3Source reference:
/affected/0/versions0.13.0-4Source reference:
/affected/0/versions0.13.0-4~exp0Source reference:
/affected/0/versions0.14.0-1Source reference:
/affected/0/versions0.14.0-1~exp0Source reference:
/affected/0/versions0.16.0-1Source reference:
/affected/0/versions0.16.1-1Source reference:
/affected/0/versions0.16.1-2Source reference:
/affected/0/versions0.16.1-2~exp0Source reference:
/affected/0/versions0.16.1-3Source reference:
/affected/0/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
gitsign
Source reference: /affected/1/package/name
- Affected versions
- 0.13.0-2
Source reference:
/affected/1/versions0.13.0-3Source reference:
/affected/1/versions0.13.0-4Source reference:
/affected/1/versions0.13.0-4~exp0Source reference:
/affected/1/versions0.14.0-1Source reference:
/affected/1/versions0.14.0-1~exp0Source reference:
/affected/1/versions - Fixed versions
- 0.16.0-1
Source reference:
/affected/1/ranges - 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": "gitsign",
"purl": "pkg:deb/debian/gitsign?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"0.13.0-2",
"0.13.0-3",
"0.13.0-4",
"0.13.0-4~exp0",
"0.14.0-1",
"0.14.0-1~exp0",
"0.16.0-1",
"0.16.1-1",
"0.16.1-2",
"0.16.1-2~exp0",
"0.16.1-3"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-44309.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "0.16.0-1"
}
]
}
],
"package": {
"name": "gitsign",
"purl": "pkg:deb/debian/gitsign?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"0.13.0-2",
"0.13.0-3",
"0.13.0-4",
"0.13.0-4~exp0",
"0.14.0-1",
"0.14.0-1~exp0"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-44309.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
]Publisher severity
No explicit severity was provided.
- Event
- #56542 · Revision 1
- Added to Heist Feed
- Publisher date