CVE-2026-58251
NATS Server: Queue Subscribe Authz Bypass
CVSS Score
6.5
EPSS Score
0.5%
EPSS Percentile
39th
NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system. Prior to 2.14.0, 2.12.7, and 2.11.16, an authenticated user with subscription deny permissions could bypass a plain subject deny rule by using a queue subscription, because queue-specific deny evaluation could override the plain subject deny result when the queue name itself was not denied. This issue is fixed in versions 2.14.0, 2.12.7, and 2.11.16.
| CWE | CWE-285 |
| Vendor | nats-io |
| Product | nats-server |
| Published | Jul 8, 2026 |
| Last Updated | Jul 9, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None
Affected Versions
nats-io / nats-server
< 2.11.16 >= 2.12.0-RC.1, < 2.12.7
References
github.com: https://github.com/nats-io/nats-server/security/advisories/GHSA-jx8g-9g95-6322 github.com: https://github.com/nats-io/nats-server/commit/013586288078def45a6788096924eb4d150db65c github.com: https://github.com/nats-io/nats-server/commit/79c2f6e9ff87f594596337b6427dda85c38d1fe1 github.com: https://github.com/nats-io/nats-server/commit/b9ffb63b85e7db3d25a13b2e234f5f7f7c13164d github.com: https://github.com/nats-io/nats-server/releases/tag/v2.11.16 github.com: https://github.com/nats-io/nats-server/releases/tag/v2.12.7 github.com: https://github.com/nats-io/nats-server/releases/tag/v2.14.0