HighFix available
Security fix for CVE-2026-23991 applied in: cosign 2.4.3-r0, cosign 2.5.3-r0, kubescape 3.0.47-r0, kyverno-fips 1.16.3-r3, policy-controller 0.12.1-r1, sigstore-scaffolding 0.7.31-r2, tkn 0.43.2-r1, t
Type: advisorySources: OSV
CVE-2026-23991 affects multiple packages. This issue is resolved in later releases. See references for individual vulnerability details.
- Products
- cosign, kubescape, kyverno-fips, policy-controller, sigstore-scaffolding, tkn, tkn-fips
- Affected versions
- Not specified
- Fixed versions
- 0.12.1-r1, 0.43.0-r3, 0.43.2-r1, 0.7.31-r2, 1.16.3-r3, 2.4.3-r0, 2.5.3-r0, 3.0.47-r0
- CVEs
- CVE-2026-23991
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 28 Oct 2026, 10:53 UTC · Revision 1
Source evidence
Security fix for CVE-2026-23991 applied in: cosign 2.4.3-r0, cosign 2.5.3-r0, kubescape 3.0.47-r0, kyverno-fips 1.16.3-r3, policy-controller 0.12.1-r1, sigstore-scaffolding 0.7.31-r2, tkn 0.43.2-r1, t
core-osv · Original sourcePublished 18 Sept 2026, 10:26 UTC
CVE-2026-23991 affects multiple packages. This issue is resolved in later releases. See references for individual vulnerability details.
osv:CLEANSTART-2026-JT87240
cosign
Fixed versions: 2.4.3-r0
cosign
Fixed versions: 2.5.3-r0
kubescape
Fixed versions: 3.0.47-r0
kyverno-fips
Fixed versions: 1.16.3-r3
policy-controller
Fixed versions: 0.12.1-r1
sigstore-scaffolding
Fixed versions: 0.7.31-r2
tkn
Fixed versions: 0.43.2-r1
tkn-fips
Fixed versions: 0.43.0-r3
Complete source record
{
"id": "c4c49e310bb1aeed0b713d6ee6547aeae8472366daf452d5f0dd18252c07c543",
"url": "https://osv.dev/vulnerability/CLEANSTART-2026-JT87240",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Security fix for CVE-2026-23991 applied in: cosign 2.4.3-r0, cosign 2.5.3-r0, kubescape 3.0.47-r0, kyverno-fips 1.16.3-r3, policy-controller 0.12.1-r1, sigstore-scaffolding 0.7.31-r2, tkn 0.43.2-r1, t",
"summary": "CVE-2026-23991 affects multiple packages. This issue is resolved in later releases. See references for individual vulnerability details.",
"evidence": "osv:CLEANSTART-2026-JT87240",
"products": [
{
"name": {
"value": "cosign",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2.4.3-r0",
"evidence": "/affected/0/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "cosign",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2.5.3-r0",
"evidence": "/affected/1/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "kubescape",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "3.0.47-r0",
"evidence": "/affected/2/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "kyverno-fips",
"evidence": "/affected/3/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1.16.3-r3",
"evidence": "/affected/3/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "policy-controller",
"evidence": "/affected/4/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "0.12.1-r1",
"evidence": "/affected/4/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "sigstore-scaffolding",
"evidence": "/affected/5/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "0.7.31-r2",
"evidence": "/affected/5/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "tkn",
"evidence": "/affected/6/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "0.43.2-r1",
"evidence": "/affected/6/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "tkn-fips",
"evidence": "/affected/7/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "0.43.0-r3",
"evidence": "/affected/7/ranges"
}
],
"affected_versions": []
}
],
"severity": "high",
"structured": {
"id": "CLEANSTART-2026-JT87240",
"aliases": [
"CLEANSTART-2026-JT87240"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.4.3-r0"
}
]
}
],
"package": {
"name": "cosign",
"purl": "pkg:apk/cleanstart/cosign",
"ecosystem": "CleanStart"
},
"database_specific": {
"source": "https://github.com/cleanstart-dev/cleanstart-security-advisories/blob/main/advisories/2026/CLEANSTART-2026-JT87240.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.5.3-r0"
}
]
}
],
"package": {
"name": "cosign",
"purl": "pkg:apk/cleanstart/cosign",
"ecosystem": "CleanStart"
},
"database_specific": {
"source": "https://github.com/cleanstart-dev/cleanstart-security-advisories/blob/main/advisories/2026/CLEANSTART-2026-JT87240.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "3.0.47-r0"
}
]
}
],
"package": {
"name": "kubescape",
"purl": "pkg:apk/cleanstart/kubescape",
"ecosystem": "CleanStart"
},
"database_specific": {
"source": "https://github.com/cleanstart-dev/cleanstart-security-advisories/blob/main/advisories/2026/CLEANSTART-2026-JT87240.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.16.3-r3"
}
]
}
],
"package": {
"name": "kyverno-fips",
"purl": "pkg:apk/cleanstart/kyverno-fips",
"ecosystem": "CleanStart"
},
"database_specific": {
"source": "https://github.com/cleanstart-dev/cleanstart-security-advisories/blob/main/advisories/2026/CLEANSTART-2026-JT87240.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "0.12.1-r1"
}
]
}
],
"package": {
"name": "policy-controller",
"purl": "pkg:apk/cleanstart/policy-controller",
"ecosystem": "CleanStart"
},
"database_specific": {
"source": "https://github.com/cleanstart-dev/cleanstart-security-advisories/blob/main/advisories/2026/CLEANSTART-2026-JT87240.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "0.7.31-r2"
}
]
}
],
"package": {
"name": "sigstore-scaffolding",
"purl": "pkg:apk/cleanstart/sigstore-scaffolding",
"ecosystem": "CleanStart"
},
"database_specific": {
"source": "https://github.com/cleanstart-dev/cleanstart-security-advisories/blob/main/advisories/2026/CLEANSTART-2026-JT87240.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "0.43.2-r1"
}
]
}
],
"package": {
"name": "tkn",
"purl": "pkg:apk/cleanstart/tkn",
"ecosystem": "CleanStart"
},
"database_specific": {
"source": "https://github.com/cleanstart-dev/cleanstart-security-advisories/blob/main/advisories/2026/CLEANSTART-2026-JT87240.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "0.43.0-r3"
}
]
}
],
"package": {
"name": "tkn-fips",
"purl": "pkg:apk/cleanstart/tkn-fips",
"ecosystem": "CleanStart"
},
"database_specific": {
"source": "https://github.com/cleanstart-dev/cleanstart-security-advisories/blob/main/advisories/2026/CLEANSTART-2026-JT87240.json"
}
}
],
"modified": "2026-10-09T07:47:14.913291137Z",
"provider": "osv",
"upstream": [
"CVE-2026-23991"
],
"references": [
"https://github.com/cleanstart-dev/cleanstart-security-advisories/tree/main/advisories/2026/CLEANSTART-2026-JT87240.json",
"https://osv.dev/vulnerability/CVE-2026-23991",
"https://nvd.nist.gov/vuln/detail/CVE-2026-23991"
],
"provider_metadata": {}
},
"related_cves": [
{
"value": "CVE-2026-23991",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 109981,
"published_at": "2026-09-18T10:26:10.422+00:00"
}