DEBIAN-CVE-2026-22703
Cosign provides code signing and transparency for containers and binaries. Prior to versions 2.6.2 and 3.0.4, Cosign bundle can be crafted to successfully verify an artifact even if the embedded Rekor entry does not reference the artifact's digest, signature or public key. When verifying a Rekor entry, Cosign verifies the Rekor entry signature, and also compares the artifact's digest, the user's public key from either a Fulcio certificate or provided by the user, and the artifact signature to the Rekor entry contents. Without these comparisons, Cosign would accept any response from Rekor as valid. A malicious actor that has compromised a user's identity or signing key could construct a valid Cosign bundle by including any arbitrary Rekor entry, thus preventing the user from being able to audit the signing event. This issue has been patched in versions 2.6.2 and 3.0.4.
DEBIAN-CVE-2026-22703
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-2026-22703
cosign
Source reference: /affected/0/package/name
- Affected versions
- 2.5.0-2
Source reference:
/affected/0/versions2.6.2-1Source reference:
/affected/0/versions2.6.2-1~exp0Source reference:
/affected/0/versions2.6.3-1Source reference:
/affected/0/versions3.0.5-1~exp0Source reference:
/affected/0/versions3.0.6-1Source reference:
/affected/0/versions3.0.6-1~exp0Source reference:
/affected/0/versions3.1.0-1~exp0Source reference:
/affected/0/versions3.1.1-1Source reference:
/affected/0/versions3.1.1-1~exp0Source reference:
/affected/0/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
cosign
Source reference: /affected/1/package/name
- Affected versions
- 2.5.0-2
Source reference:
/affected/1/versions2.6.2-1~exp0Source reference:
/affected/1/versions - Fixed versions
- 2.6.2-1
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": "cosign",
"purl": "pkg:deb/debian/cosign?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"2.5.0-2",
"2.6.2-1",
"2.6.2-1~exp0",
"2.6.3-1",
"3.0.5-1~exp0",
"3.0.6-1",
"3.0.6-1~exp0",
"3.1.0-1~exp0",
"3.1.1-1",
"3.1.1-1~exp0"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-22703.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.6.2-1"
}
]
}
],
"package": {
"name": "cosign",
"purl": "pkg:deb/debian/cosign?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"2.5.0-2",
"2.6.2-1~exp0"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-22703.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
]Publisher severity
No explicit severity was provided.
- Event
- #55575 · Revision 1
- Added to Heist Feed
- Publisher date