HighFix available
nats-server — security advisory
NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system. Prior to 2.12.8 and 2.11.17, an unauthenticated peer with network access to a leafnode listener with compression enabled could crash the server during the pre-authentication leafnode handshake by sending repeated leafnode INFO protocol messages before authentication and account setup completed. This issue is fixed in versions 2.12.8 and 2.11.17.
- Products
- nats-server
- Affected versions
- 2.10.1-1, 2.10.16-1, 2.10.18-1, 2.10.24-1, 2.10.27-1, 2.10.3-1, 2.10.4-1, 2.10.7-1, 2.12.4-1, 2.12.6-1, 2.14.1-1, 2.14.3-1, 2.14.6-1, 2.15.1-1, 2.9.10-1, 2.9.19-1
- Fixed versions
- 2.14.1-1
- CVEs
- CVE-2026-58250
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 13:35 UTC · Revision 2
Source evidence
NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system. Prior to 2.12.8 and 2.11.17, an unauthenticated peer with network access to a leafnode listener with compression enabled could crash the server during the pre-authentication leafnode handshake by sending repeated leafnode INFO protocol messages before authentication and account setup completed. This issue is fixed in versions 2.12.8 and 2.11.17.
osv:DEBIAN-CVE-2026-58250
nats-server
Fixed versions: Not specified
nats-server
Fixed versions: Not specified
nats-server
Fixed versions: 2.14.1-1
Complete source record
{
"id": "61b85dd6da2df86c06502f55a1f7154afafd010eafa66642f4655d0173082ccd",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2026-58250",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2026-58250",
"summary": "NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system. Prior to 2.12.8 and 2.11.17, an unauthenticated peer with network access to a leafnode listener with compression enabled could crash the server during the pre-authentication leafnode handshake by sending repeated leafnode INFO protocol messages before authentication and account setup completed. This issue is fixed in versions 2.12.8 and 2.11.17.",
"evidence": "osv:DEBIAN-CVE-2026-58250",
"products": [
{
"name": {
"value": "nats-server",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "2.10.1-1",
"evidence": "/affected/0/versions"
},
{
"value": "2.10.16-1",
"evidence": "/affected/0/versions"
},
{
"value": "2.10.18-1",
"evidence": "/affected/0/versions"
},
{
"value": "2.10.24-1",
"evidence": "/affected/0/versions"
},
{
"value": "2.10.27-1",
"evidence": "/affected/0/versions"
},
{
"value": "2.10.3-1",
"evidence": "/affected/0/versions"
},
{
"value": "2.10.4-1",
"evidence": "/affected/0/versions"
},
{
"value": "2.10.7-1",
"evidence": "/affected/0/versions"
},
{
"value": "2.12.4-1",
"evidence": "/affected/0/versions"
},
{
"value": "2.12.6-1",
"evidence": "/affected/0/versions"
},
{
"value": "2.14.1-1",
"evidence": "/affected/0/versions"
},
{
"value": "2.14.3-1",
"evidence": "/affected/0/versions"
},
{
"value": "2.14.6-1",
"evidence": "/affected/0/versions"
},
{
"value": "2.15.1-1",
"evidence": "/affected/0/versions"
},
{
"value": "2.9.10-1",
"evidence": "/affected/0/versions"
},
{
"value": "2.9.19-1",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "nats-server",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "2.10.27-1",
"evidence": "/affected/1/versions"
},
{
"value": "2.12.4-1",
"evidence": "/affected/1/versions"
},
{
"value": "2.12.6-1",
"evidence": "/affected/1/versions"
},
{
"value": "2.14.1-1",
"evidence": "/affected/1/versions"
},
{
"value": "2.14.3-1",
"evidence": "/affected/1/versions"
},
{
"value": "2.14.6-1",
"evidence": "/affected/1/versions"
},
{
"value": "2.15.1-1",
"evidence": "/affected/1/versions"
}
]
},
{
"name": {
"value": "nats-server",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2.14.1-1",
"evidence": "/affected/2/ranges"
}
],
"affected_versions": [
{
"value": "2.10.27-1",
"evidence": "/affected/2/versions"
},
{
"value": "2.12.4-1",
"evidence": "/affected/2/versions"
},
{
"value": "2.12.6-1",
"evidence": "/affected/2/versions"
}
]
}
],
"severity": "high",
"structured": {
"id": "DEBIAN-CVE-2026-58250",
"aliases": [
"DEBIAN-CVE-2026-58250"
],
"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"
}
]
}
],
"package": {
"name": "nats-server",
"purl": "pkg:deb/debian/nats-server?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"2.10.1-1",
"2.10.16-1",
"2.10.18-1",
"2.10.24-1",
"2.10.27-1",
"2.10.3-1",
"2.10.4-1",
"2.10.7-1",
"2.12.4-1",
"2.12.6-1",
"2.14.1-1",
"2.14.3-1",
"2.14.6-1",
"2.15.1-1",
"2.9.10-1",
"2.9.19-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-58250.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "nats-server",
"purl": "pkg:deb/debian/nats-server?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"2.10.27-1",
"2.12.4-1",
"2.12.6-1",
"2.14.1-1",
"2.14.3-1",
"2.14.6-1",
"2.15.1-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-58250.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.14.1-1"
}
]
}
],
"package": {
"name": "nats-server",
"purl": "pkg:deb/debian/nats-server?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"2.10.27-1",
"2.12.4-1",
"2.12.6-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-58250.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
],
"modified": "2026-10-26T12:02:37.070574793Z",
"provider": "osv",
"upstream": [
"CVE-2026-58250"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2026-58250"
]
},
"related_cves": [
{
"value": "CVE-2026-58250",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 452574,
"published_at": "2026-07-08T20:16:54.483+00:00"
}