UBUNTU-CVE-2026-58213
NATS Server versions prior to 2.14.1 and 2.12.9 contain a vulnerability where an MQTT client can inject protocol control characters in subscription filters. These characters are forwarded as NATS protocol data to route or leafnode connections, corrupting the protocol stream and enabling injection of unintended NATS protocol operations. This issue is fixed in versions 2.14.1 and 2.12.9. Several Ubuntu package versions of nats-server are affected.
AI Analysis
Technical Summary
NATS Server, a high-performance messaging server for NATS.io, has a vulnerability in versions before 2.14.1 and 2.12.9. An MQTT client can include protocol control characters in subscription filters that are forwarded as NATS protocol data to route or leafnode connections. This forwarding corrupts the protocol stream and allows injection of unintended NATS protocol operations. The vulnerability is resolved in versions 2.14.1 and 2.12.9. The affected Ubuntu package versions include multiple releases from 2.9.19-1build1 through 2.10.27-1build1.
Potential Impact
The vulnerability allows an MQTT client to inject unintended NATS protocol operations by corrupting the forwarded protocol stream. This can lead to unauthorized protocol manipulation with high confidentiality impact and low integrity impact, but no availability impact is indicated. There are no known exploits in the wild at this time.
Mitigation Recommendations
A fix is available in NATS Server versions 2.14.1 and 2.12.9. Users should upgrade affected versions to at least 2.14.1 or 2.12.9 to remediate this vulnerability. No other mitigation guidance is provided.
UBUNTU-CVE-2026-58213
Description
NATS Server versions prior to 2.14.1 and 2.12.9 contain a vulnerability where an MQTT client can inject protocol control characters in subscription filters. These characters are forwarded as NATS protocol data to route or leafnode connections, corrupting the protocol stream and enabling injection of unintended NATS protocol operations. This issue is fixed in versions 2.14.1 and 2.12.9. Several Ubuntu package versions of nats-server are affected.
CVSS v3.1
Score 7.1high
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 for NATS.io, has a vulnerability in versions before 2.14.1 and 2.12.9. An MQTT client can include protocol control characters in subscription filters that are forwarded as NATS protocol data to route or leafnode connections. This forwarding corrupts the protocol stream and allows injection of unintended NATS protocol operations. The vulnerability is resolved in versions 2.14.1 and 2.12.9. The affected Ubuntu package versions include multiple releases from 2.9.19-1build1 through 2.10.27-1build1.
Potential Impact
The vulnerability allows an MQTT client to inject unintended NATS protocol operations by corrupting the forwarded protocol stream. This can lead to unauthorized protocol manipulation with high confidentiality impact and low integrity impact, but no availability impact is indicated. There are no known exploits in the wild at this time.
Mitigation Recommendations
A fix is available in NATS Server versions 2.14.1 and 2.12.9. Users should upgrade affected versions to at least 2.14.1 or 2.12.9 to remediate this vulnerability. No other mitigation guidance is provided.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- UBUNTU-CVE-2026-58213
- 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
- 3.1
Threat ID: 6a58b45d68715ace43d6be3f
Added to database: 07/16/2026, 10:37:17 UTC
Last enriched: 07/16/2026, 11:36:28 UTC
Last updated: 07/31/2026, 19:24:47 UTC
Views: 18
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