PT-2026-56564 · Nats.Io · Nats Server

Published 2026-07-08 · Updated 2026-07-08 · CVE-2026-58252

NVD

CVSS v3.1

6.5

Medium

Base vector

AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

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.

Fix

Improper Authorization

Weakness Enumeration

CWE-285

Related Identifiers

CVE-2026-58252

Affected Products

Nats Server

References · 8

• https://nvd.nist.gov/vuln/detail/CVE-2026-58252 · Security Note
• https://github.com/nats-io/nats-server/commit/e611ca9604697b02d8f22beb76037400a9cf72e6 · Note
• https://github.com/nats-io/nats-server/security/advisories/GHSA-wh7g-5m82-pmhr · Note
• https://github.com/nats-io/nats-server/releases/tag/v2.12.7 · Note
• https://github.com/nats-io/nats-server/commit/8ced85a11497f86704a95d960281480ce037386b · Note
• https://github.com/nats-io/nats-server/releases/tag/v2.11.16 · Note
• https://github.com/nats-io/nats-server/releases/tag/v2.14.0 · Note
• https://github.com/nats-io/nats-server/commit/a42a6d1e258eb5c3a2190384d31965a4b715e854 · Note