CVE-2026-58254

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Source
https://cve.org/CVERecord?id=CVE-2026-58254
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-58254.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-58254
Aliases
Downstream
Published
2026-07-08T19:56:58.311Z
Modified
2026-07-16T03:48:40.550473818Z
Severity
  • 5.3 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N CVSS Calculator
Summary
NATS Server: Incomplete fix for CVE-2026-33249: Leaf node connections bypass Nats-Trace-Dest permission check
Details

NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system. Prior to 2.14.3 and 2.12.8, message trace destination checks were applied to ordinary client connections but not consistently to messages arriving through leafnode connections, allowing a leafnode operator to send trace events to subjects that would not otherwise be permitted and to use trace-only behavior to prevent normal delivery or storage of affected messages. This issue is fixed in versions 2.14.3 and 2.12.8.

Database specific 
{
    "cwe_ids": [
        "CWE-863"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/58xxx/CVE-2026-58254.json",
    "cna_assigner": "GitHub_M"
}
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
e9559e9ae3cd09ed29b157e6f19babb2cd1609e5
Introduced
0cbd01caf8f29011c26273ff7662addd3830396a
Fixed
9b17a586be69c9ff36e4c84a421ca47da410b561
Fixed
cbe845932980b71563efac5cfa4cc751c88936cd
Database specific
Show details 
{
    "cpe": "cpe:2.3:a:linuxfoundation:nats-server:*:*:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "2.12.8"
        },
        {
            "introduced": "2.14.0"
        },
        {
            "fixed": "2.14.3"
        }
    ],
    "source": [
        "CPE_RANGE",
        "REFERENCES"
    ]
}

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
v2.11.2
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
v2.12.0
v2.12.0-RC.1
v2.12.0-RC.2
v2.12.0-RC.3
v2.12.0-RC.4
v2.12.0-RC.5
v2.12.0-RC.6
v2.12.0-preview.1
v2.12.0-preview.2
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
v2.14.0
v2.14.1
v2.14.1-RC.1
v2.14.1-RC.2
v2.14.2
v2.14.2-RC.1
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-2026-58254.json"