NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system. Prior to 2.14.3 and 2.12.12, an authenticated MQTT client could subscribe to the internal $MQTT.deliver.pubrel subject family, bypassing configured subscribe permissions and exposing MQTT QoS2 protocol metadata for sessions in the account. This issue is fixed in versions 2.14.3 and 2.12.12.
Advisories
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Fixes
Solution
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Workaround
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References
History
Fri, 10 Jul 2026 09:30:00 +0000
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Nats
Nats nats Server |
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| Vendors & Products |
Nats
Nats nats Server |
Thu, 09 Jul 2026 14:30:00 +0000
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| Metrics |
ssvc
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Wed, 08 Jul 2026 20:15:00 +0000
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| Description | NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system. Prior to 2.14.3 and 2.12.12, an authenticated MQTT client could subscribe to the internal $MQTT.deliver.pubrel subject family, bypassing configured subscribe permissions and exposing MQTT QoS2 protocol metadata for sessions in the account. This issue is fixed in versions 2.14.3 and 2.12.12. | |
| Title | NATS Server: MQTT subscribe ACL bypass via $MQTT.deliver.pubrel prefix (incomplete fix for CVE-2026-33217) | |
| Weaknesses | CWE-863 | |
| References |
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| Metrics |
cvssV3_1
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Projects
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Status: PUBLISHED
Assigner: GitHub_M
Published:
Updated: 2026-07-09T13:32:36.057Z
Reserved: 2026-06-29T17:09:25.873Z
Link: CVE-2026-58214
Updated: 2026-07-09T13:32:29.852Z
No data.
No data.
OpenCVE Enrichment
Updated: 2026-07-26T17:15:04Z
Weaknesses