CVE-2026-58250

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Source
https://cve.org/CVERecord?id=CVE-2026-58250
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-58250.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-58250
Aliases
Downstream
AZL (1)
DEBIAN (1)
JLSEC (1)
MINI (2)
UBUNTU (1)
Published
2026-07-08T19:48:55Z
Modified
2026-10-28T02:30:42Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
NATS Server: Pre-auth server crash via double INFO in leafnode handshake
Details

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.

Database specific 
{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-476"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/58xxx/CVE-2026-58250.json"
}
References

Affected packages

Git / github.com/nats-io/nats-server

Affected ranges

Type
GIT
Repo
https://github.com/nats-io/nats-server
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
0f192db71455eaca7f1fef14548a239845f24b96
Introduced
fc6ec648d806652d282d2f0edb6cb9f22c895572
Fixed
e9559e9ae3cd09ed29b157e6f19babb2cd1609e5
Fixed
8dcb26eaea78fdcbe96dbee5986d6019fd5cb94a
Fixed
fc5fe39177533e9dbdd651d2458285bfae1dde27
Database specific
Show details 
{
    "extracted_events": [
        {
            "cpe": "cpe:2.3:a:linuxfoundation:nats-server:*:*:*:*:*:*:*:*",
            "range": [
                {
                    "introduced": "0"
                },
                {
                    "fixed": "2.11.17"
                }
            ],
            "source": "CPE_RANGE"
        },
        {
            "cpe": "cpe:2.3:a:linuxfoundation:nats-server:*:*:*:*:*:*:*:*",
            "range": [
                {
                    "introduced": "2.12.0"
                },
                {
                    "fixed": "2.12.8"
                }
            ],
            "source": "CPE_RANGE"
        },
        {
            "range": [
                {
                    "fixed": "8dcb26eaea78fdcbe96dbee5986d6019fd5cb94a"
                }
            ],
            "source": "REFERENCES_COMMIT"
        },
        {
            "range": [
                {
                    "fixed": "fc5fe39177533e9dbdd651d2458285bfae1dde27"
                }
            ],
            "source": "REFERENCES_COMMIT"
        },
        {
            "original_tag": "v2.11.17",
            "range": [
                {
                    "fixed": "0f192db71455eaca7f1fef14548a239845f24b96"
                }
            ],
            "source": "REFERENCES_TAG"
        },
        {
            "original_tag": "v2.12.8",
            "range": [
                {
                    "fixed": "e9559e9ae3cd09ed29b157e6f19babb2cd1609e5"
                }
            ],
            "source": "REFERENCES_TAG"
        }
    ]
}

Affected versions

v0.*
v0.5.1
v0.5.2
v0.5.4
v0.5.6
v0.6.0
v0.6.2
v0.6.4
v0.6.6
v0.6.8
v0.7.0
v0.7.2
v0.8.0
v0.8.1
v0.9.2
v0.9.4
v0.9.6
v1.*
v1.0.0
v1.0.2
v1.0.4
v1.0.6
v1.1.0
v1.2.0
v1.3.0
v2.*
v2.0.0
v2.0.0-RC14
v2.0.0-RC19
v2.0.2
v2.0.4
v2.1.0
v2.1.2
v2.1.4
v2.1.6
v2.1.7
v2.10.0
v2.10.1
v2.10.2
v2.10.3
v2.11.0
v2.11.0-RC.1
v2.11.0-RC.2
v2.11.0-RC.3
v2.11.0-RC.4
v2.11.0-RC.5
v2.11.10
v2.11.10-RC.1
v2.11.11
v2.11.11-RC.1
v2.11.11-RC.2
v2.11.11-RC.3
v2.11.11-RC.4
v2.11.12
v2.11.12-RC.1
v2.11.12-RC.2
v2.11.12-RC.3
v2.11.12-RC.4
v2.11.12-RC.5
v2.11.12-RC.6
v2.11.12-RC.7
v2.11.14
v2.11.15
v2.11.16
v2.11.2
v2.11.2-RC.1
v2.11.2-RC.2
v2.11.2-RC.3
v2.11.3
v2.11.3-RC.1
v2.11.3-RC.2
v2.11.4
v2.11.4-RC.1
v2.11.4-RC.2
v2.11.4-RC.3
v2.11.5
v2.11.5-RC.1
v2.11.5-RC.2
v2.11.5-RC.3
v2.11.5-RC.4
v2.11.6
v2.11.6-RC.1
v2.11.7
v2.11.7-RC.1
v2.11.7-RC.2
v2.11.7-RC.3
v2.11.8
v2.11.8-RC.1
v2.11.9
v2.11.9-RC.1
v2.11.9-RC.2
v2.11.9-RC.3
v2.12.0
v2.12.1
v2.12.1-RC.1
v2.12.1-RC.2
v2.12.1-RC.3
v2.12.1-RC.4
v2.12.1-RC.5
v2.12.2
v2.12.2-RC.1
v2.12.2-RC.2
v2.12.2-RC.3
v2.12.2-RC.4
v2.12.3
v2.12.3-RC.1
v2.12.3-RC.2
v2.12.3-RC.3
v2.12.3-RC.4
v2.12.3-RC.5
v2.12.4
v2.12.4-RC.1
v2.12.4-RC.2
v2.12.4-RC.3
v2.12.4-RC.4
v2.12.4-RC.5
v2.12.4-RC.6
v2.12.5
v2.12.5-RC.1
v2.12.5-RC.2
v2.12.6
v2.12.7
v2.2.0
v2.2.1
v2.2.2
v2.2.3
v2.2.4
v2.2.5
v2.2.6
v2.3.0
v2.3.1
v2.3.2
v2.3.3
v2.3.4
v2.4.0
v2.5.0
v2.6.0
v2.6.1
v2.6.2
v2.6.3
v2.6.4
v2.6.5
v2.6.6
v2.7.0
v2.7.0-rc1
v2.7.0-rc2
v2.7.1
v2.7.2
v2.7.3
v2.7.4
v2.8.0
v2.8.1
v2.8.2
v2.8.3
v2.8.4
v2.9.0
v2.9.1
v2.9.10
v2.9.11
v2.9.12
v2.9.14
v2.9.15
v2.9.16
v2.9.17
v2.9.18
v2.9.19
v2.9.2
v2.9.20
v2.9.21
v2.9.22
v2.9.3
v2.9.4
v2.9.5
v2.9.6
v2.9.7
v2.9.8
v2.9.9

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-58250.json"