UBUNTU-CVE-2026-58254
NATS Server versions prior to 2.14.3 and 2.12.8 contain a vulnerability where message trace destination checks are inconsistently applied to messages arriving through leafnode connections. This allows a leafnode operator to send trace events to unauthorized subjects and use trace-only behavior to disrupt normal message delivery or storage. The issue is fixed in versions 2.14.3 and 2.12.8.
AI Analysis
Technical Summary
NATS Server, a high-performance messaging server, has a vulnerability in versions before 2.14.3 and 2.12.8 where trace destination checks are not consistently enforced on messages arriving via leafnode connections. This inconsistency permits a leafnode operator to send trace events to subjects that would normally be disallowed, enabling them to leverage trace-only behavior to prevent the normal delivery or storage of affected messages. The vulnerability is addressed by applying consistent trace destination checks in the fixed versions 2.14.3 and 2.12.8.
Potential Impact
An attacker with leafnode operator privileges can bypass normal message trace destination restrictions, potentially sending trace events to unauthorized subjects. This can be used to disrupt normal message delivery or storage, impacting message reliability and integrity within the NATS messaging system.
Mitigation Recommendations
Upgrade affected NATS Server versions to 2.14.3 or 2.12.8 or later, where the vulnerability is fixed. No other mitigation is indicated by the advisory.
UBUNTU-CVE-2026-58254
Description
NATS Server versions prior to 2.14.3 and 2.12.8 contain a vulnerability where message trace destination checks are inconsistently applied to messages arriving through leafnode connections. This allows a leafnode operator to send trace events to unauthorized subjects and use trace-only behavior to disrupt normal message delivery or storage. The issue is fixed in versions 2.14.3 and 2.12.8.
CVSS v4.0
Affected software
pkg:deb/ubuntu/[email protected]?arch=source&distro=noblepkg:deb/ubuntu/[email protected]?arch=source&distro=questingpkg:deb/ubuntu/[email protected]~esm1?arch=source&distro=esm-apps/resoluteRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
NATS Server, a high-performance messaging server, has a vulnerability in versions before 2.14.3 and 2.12.8 where trace destination checks are not consistently enforced on messages arriving via leafnode connections. This inconsistency permits a leafnode operator to send trace events to subjects that would normally be disallowed, enabling them to leverage trace-only behavior to prevent the normal delivery or storage of affected messages. The vulnerability is addressed by applying consistent trace destination checks in the fixed versions 2.14.3 and 2.12.8.
Potential Impact
An attacker with leafnode operator privileges can bypass normal message trace destination restrictions, potentially sending trace events to unauthorized subjects. This can be used to disrupt normal message delivery or storage, impacting message reliability and integrity within the NATS messaging system.
Mitigation Recommendations
Upgrade affected NATS Server versions to 2.14.3 or 2.12.8 or later, where the vulnerability is fixed. No other mitigation is indicated by the advisory.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- UBUNTU-CVE-2026-58254
- Osv Schema Version
- 1.7.0
- Aliases
- []
- Ecosystems
- ["Ubuntu:24.04:LTS","Ubuntu:25.10","Ubuntu:Pro:26.04:LTS"]
- Database Specific Severity
- null
- Cvss Version
- 4.0
Threat ID: 6a58b45d68715ace43d6be21
Added to database: 07/16/2026, 10:37:17 UTC
Last enriched: 07/16/2026, 11:35:12 UTC
Last updated: 07/31/2026, 19:24:47 UTC
Views: 4
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