CVE-2026-58251
published 2026-07-08CVE-2026-58251: 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…
PriorityP341medium6.5CVSS 3.1
AVNACLPRLUINSUCHINAN
EPSS
0.46%
38.6th percentile
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.
Affected
4 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| linuxfoundation | nats-server | < 2.11.16 | 2.11.16 |
| linuxfoundation | nats-server | >= 2.12.0 < 2.12.7 | 2.12.7 |
| nats-io | nats-server | < 2.11.16 | 2.11.16 |
| nats-io | nats-server | — | — |
CVSS provenance
nvdv3.16.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
vendor_redhat6.5MEDIUM
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Bugzilla
CVE-2026-58251 golang-github-nats-io-streaming-server: NATS Server: Information disclosure due to bypass of subject deny rules via queue subscriptions [fedora-all]
bugzilla·2026-07-13·CVSS 6.5
CVE-2026-58251 [MEDIUM] CVE-2026-58251 golang-github-nats-io-streaming-server: NATS Server: Information disclosure due to bypass of subject deny rules via queue subscriptions [fedora-all]
CVE-2026-58251 golang-github-nats-io-streaming-server: NATS Server: Information disclosure due to bypass of subject deny rules via queue subscriptions [fedora-all]
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
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
Bugzilla
CVE-2026-58251 github.com/nats-io/nats-server: NATS Server: Information disclosure due to bypass of subject deny rules via queue subscriptions
bugzilla·2026-07-08·CVSS 6.5
CVE-2026-58251 [MEDIUM] CVE-2026-58251 github.com/nats-io/nats-server: NATS Server: Information disclosure due to bypass of subject deny rules via queue subscriptions
CVE-2026-58251 github.com/nats-io/nats-server: NATS Server: Information disclosure due to bypass of subject deny rules via queue subscriptions
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.
https://github.com/nats-io/nats-server/commit/013586288078def45a6788096924eb4d150db65chttps://github.com/nats-io/nats-server/commit/79c2f6e9ff87f594596337b6427dda85c38d1fe1https://github.com/nats-io/nats-server/commit/b9ffb63b85e7db3d25a13b2e234f5f7f7c13164dhttps://github.com/nats-io/nats-server/releases/tag/v2.11.16https://github.com/nats-io/nats-server/releases/tag/v2.12.7https://github.com/nats-io/nats-server/releases/tag/v2.14.0https://github.com/nats-io/nats-server/security/advisories/GHSA-jx8g-9g95-6322
2026-07-08
Published