CriticalFix available
Previously, after a channel has been established, a malicious peer could send crafted messages that would deadlock the entire connection
Type: advisorySources: OSV
CVE-2026-56855 affects multiple packages. Previously, after a channel has been established, a malicious peer could send crafted messages that would deadlock the entire connection. See references for individual vulnerability details.
- Products
- grafana-alloy, kube-state-metrics-fips, kubernetes, step-ca
- Affected versions
- Not specified
- Fixed versions
- 0.28.4-r5, 1.16.3-r1, 1.36.3-r3, 2.18.0-r3, 2.19.1-r1
- CVEs
- CVE-2026-56855
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 28 Oct 2026, 09:52 UTC · Revision 1
Source evidence
Previously, after a channel has been established, a malicious peer could send crafted messages that would deadlock the entire connection
core-osv · Original sourcePublished 29 Sept 2026, 00:34 UTC
CVE-2026-56855 affects multiple packages. Previously, after a channel has been established, a malicious peer could send crafted messages that would deadlock the entire connection. See references for individual vulnerability details.
osv:CLEANSTART-2026-JI49004
kube-state-metrics-fips
Fixed versions: 2.18.0-r3
kube-state-metrics-fips
Fixed versions: 2.19.1-r1
step-ca
Fixed versions: 0.28.4-r5
kubernetes
Fixed versions: 1.36.3-r3
grafana-alloy
Fixed versions: 1.16.3-r1
Complete source record
{
"id": "09bc2463df4d38f1906c4ac320c1bcc7e4b9ea77b1a598acf7164d0a430b3282",
"url": "https://osv.dev/vulnerability/CLEANSTART-2026-JI49004",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Previously, after a channel has been established, a malicious peer could send crafted messages that would deadlock the entire connection",
"summary": "CVE-2026-56855 affects multiple packages. Previously, after a channel has been established, a malicious peer could send crafted messages that would deadlock the entire connection. See references for individual vulnerability details.",
"evidence": "osv:CLEANSTART-2026-JI49004",
"products": [
{
"name": {
"value": "kube-state-metrics-fips",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2.18.0-r3",
"evidence": "/affected/0/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "kube-state-metrics-fips",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2.19.1-r1",
"evidence": "/affected/1/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "step-ca",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "0.28.4-r5",
"evidence": "/affected/2/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "kubernetes",
"evidence": "/affected/3/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1.36.3-r3",
"evidence": "/affected/3/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "grafana-alloy",
"evidence": "/affected/4/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1.16.3-r1",
"evidence": "/affected/4/ranges"
}
],
"affected_versions": []
}
],
"severity": "critical",
"structured": {
"id": "CLEANSTART-2026-JI49004",
"aliases": [
"CLEANSTART-2026-JI49004"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.18.0-r3"
}
]
}
],
"package": {
"name": "kube-state-metrics-fips",
"purl": "pkg:apk/cleanstart/kube-state-metrics-fips",
"ecosystem": "CleanStart"
},
"database_specific": {
"source": "https://github.com/cleanstart-dev/cleanstart-security-advisories/blob/main/advisories/2026/CLEANSTART-2026-JI49004.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.19.1-r1"
}
]
}
],
"package": {
"name": "kube-state-metrics-fips",
"purl": "pkg:apk/cleanstart/kube-state-metrics-fips",
"ecosystem": "CleanStart"
},
"database_specific": {
"source": "https://github.com/cleanstart-dev/cleanstart-security-advisories/blob/main/advisories/2026/CLEANSTART-2026-JI49004.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "0.28.4-r5"
}
]
}
],
"package": {
"name": "step-ca",
"purl": "pkg:apk/cleanstart/step-ca",
"ecosystem": "CleanStart"
},
"database_specific": {
"source": "https://github.com/cleanstart-dev/cleanstart-security-advisories/blob/main/advisories/2026/CLEANSTART-2026-JI49004.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.36.3-r3"
}
]
}
],
"package": {
"name": "kubernetes",
"purl": "pkg:apk/cleanstart/kubernetes",
"ecosystem": "CleanStart"
},
"database_specific": {
"source": "https://github.com/cleanstart-dev/cleanstart-security-advisories/blob/main/advisories/2026/CLEANSTART-2026-JI49004.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.16.3-r1"
}
]
}
],
"package": {
"name": "grafana-alloy",
"purl": "pkg:apk/cleanstart/grafana-alloy",
"ecosystem": "CleanStart"
},
"database_specific": {
"source": "https://github.com/cleanstart-dev/cleanstart-security-advisories/blob/main/advisories/2026/CLEANSTART-2026-JI49004.json"
}
}
],
"modified": "2026-10-08T16:47:28.624595457Z",
"provider": "osv",
"upstream": [
"CVE-2026-56855"
],
"references": [
"https://github.com/cleanstart-dev/cleanstart-security-advisories/tree/main/advisories/2026/CLEANSTART-2026-JI49004.json",
"https://osv.dev/vulnerability/CVE-2026-56855",
"https://nvd.nist.gov/vuln/detail/CVE-2026-56855"
],
"provider_metadata": {}
},
"related_cves": [
{
"value": "CVE-2026-56855",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 103184,
"published_at": "2026-09-29T00:34:59.739+00:00"
}