NATS Server: Subscribe Authz Bypass via Wildcard-Overlap
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 could receive messages on denied subjects when a wildcard subscription overlapped with a configured wildcard deny rule but was not a subset of it, and queue subscriptions could also affect delivery to legitimate queue consumers. This issue is fixed in versions 2.14.0, 2.12.7, and 2.11.16.
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describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2026-58252US | — | — | ||
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 could receive messages… | ||||
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references
External citations — patches, advisories, analysis.
- https://github.com/nats-io/nats-server/commit/8ced85a11497f86704a95d960281480ce037386bFIX
- https://github.com/nats-io/nats-server/commit/a42a6d1e258eb5c3a2190384d31965a4b715e854FIX
- https://github.com/nats-io/nats-server/commit/e611ca9604697b02d8f22beb76037400a9cf72e6FIX
- https://github.com/nats-io/nats-server/releases/tag/v2.11.16ARTICLE
- https://github.com/nats-io/nats-server/releases/tag/v2.12.7ARTICLE
- https://github.com/nats-io/nats-server/releases/tag/v2.14.0ARTICLE
- https://github.com/nats-io/nats-server/security/advisories/GHSA-wh7g-5m82-pmhrADVISORY
- https://nvd.nist.gov/vuln/detail/CVE-2026-58252WEB
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