CVE-2026-58252

NATS Server: Subscribe Authz Bypass via Wildcard-Overlap

Published: Jul 8, 2026Updated: Jul 13, 2026 Sources: CVE List NVDCWE-285

6.5MEDIUM

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.

No summary for this CVE yet.

CVSS Vector Breakdown

Exploitability

AV:NAttack Vector

Network

AC:LAttack Complexity

Low

PR:LPrivileges Required

Low

UI:NUser Interaction

None

Scope

S:UScope

Unchanged

Impact

C:HConfidentiality

High

I:NIntegrity

None

A:NAvailability

None

Open in CVSS calculator →

Weaknesses

CWE-285

Affected Products

linuxfoundation

oss-project·USaka everest, yocto, pytorch

nats-serverOn-premDatabase

AI / ML / vector-db-rag

nats-io

oss-project

nats-serverOn-prem

Databases / cache-message-queue

Exploitability

Official Patch Available

References

https://github.com/nats-io/nats-server/commit/8ced85a11497f86704a95d960281480ce037386b

github.com

https://github.com/nats-io/nats-server/commit/a42a6d1e258eb5c3a2190384d31965a4b715e854

github.com

https://github.com/nats-io/nats-server/commit/e611ca9604697b02d8f22beb76037400a9cf72e6

github.com

and 4 more references View all →

Unlock Complete Vulnerability Intelligence

Get the full picture for CVE-2026-58252 and every CVE in our database. Create a free account — no credit card required.

Create Free Account

Plain-language analysis

Impact assessment and exploitation scenario in plain English

Attack graph visualization

Interactive attack path and kill chain mapping

Exploit details & PoC links

ExploitDB, Metasploit, GitHub PoCs with direct links

Nuclei scanner templates

Ready-to-use vulnerability scanner templates

Full remediation guide

Patch instructions, workarounds, and compliance impact

Interactive AI chat

Ask questions about this vulnerability in natural language

Related vulnerabilities

Semantically similar CVEs and attack patterns

REST API & MCP access

Integrate vulnerability data into your workflows