6.5Medium
CVE-2026-58252NATS Server: Subscribe Authz Bypass via Wildcard-Overlap
Description
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.
Weakness (CWE):
CWE-285
Data: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Published as the sources state it, in English.
Affected products and versions
| Vendor | Product | Versions | |
|---|---|---|---|
| linuxfoundation | nats-server | < 2.11.16 | |
| nats-io | nats-server | < 2.11.16, >= 2.12.0-preview.1, < 2.12.7 |
References and patches
- https://github.com/nats-io/nats-server/security/advisories/GHSA-wh7g-5m82-pmhr Vendor Advisory
- https://github.com/nats-io/nats-server/commit/8ced85a11497f86704a95d960281480ce037386b Patch
- https://github.com/nats-io/nats-server/commit/a42a6d1e258eb5c3a2190384d31965a4b715e854 Patch
- https://github.com/nats-io/nats-server/commit/e611ca9604697b02d8f22beb76037400a9cf72e6 Patch
- https://github.com/nats-io/nats-server/releases/tag/v2.11.16 Release Notes
- https://github.com/nats-io/nats-server/releases/tag/v2.12.7 Release Notes
- https://github.com/nats-io/nats-server/releases/tag/v2.14.0 Release Notes
CPE matches (NVD) (2)
cpe:2.3:a:linuxfoundation:nats-server:*:*:*:*:*:*:*:*< 2.11.16cpe:2.3:a:linuxfoundation:nats-server:*:*:*:*:*:*:*:*≥ 2.12.0 < 2.12.7