PT-2026-56537 · Nats.Io · Nats Server

Published 2026-07-08 · Updated 2026-07-08 · CVE-2026-58251

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 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.

Fix

Improper Authorization

Weakness Enumeration

CWE-285

Related Identifiers

CVE-2026-58251

Affected Products

Nats Server

References · 8

• https://nvd.nist.gov/vuln/detail/CVE-2026-58251 · Security Note
• https://github.com/nats-io/nats-server/security/advisories/GHSA-jx8g-9g95-6322 · Note
• https://github.com/nats-io/nats-server/releases/tag/v2.12.7 · Note
• https://github.com/nats-io/nats-server/commit/013586288078def45a6788096924eb4d150db65c · Note
• https://github.com/nats-io/nats-server/releases/tag/v2.11.16 · Note
• https://github.com/nats-io/nats-server/commit/79c2f6e9ff87f594596337b6427dda85c38d1fe1 · Note
• https://github.com/nats-io/nats-server/commit/b9ffb63b85e7db3d25a13b2e234f5f7f7c13164d · Note
• https://github.com/nats-io/nats-server/releases/tag/v2.14.0 · Note