CVE-2026-58252
NATS 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.
INFO
Published Date :
July 8, 2026, 8:16 p.m.
Last Modified :
July 8, 2026, 8:16 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
Affected Products
The following products are affected by CVE-2026-58252
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
- Update NATS Server to version 2.14.0 or later.
- Apply patch for versions 2.12.7 or 2.11.16.
- Ensure wildcard subscriptions follow deny rules.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-58252.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-58252 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-58252
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-58252 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-58252 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
New CVE Received by [email protected]
Jul. 08, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'nats-io', 'product': 'nats-server', 'versions': [{'status': 'affected', 'version': '< 2.11.16'}, {'status': 'affected', 'version': '>= 2.12.0-preview.1, < 2.12.7'}]}] Added 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. Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N Added CWE CWE-285 Added Reference https://github.com/nats-io/nats-server/commit/8ced85a11497f86704a95d960281480ce037386b Added Reference https://github.com/nats-io/nats-server/commit/a42a6d1e258eb5c3a2190384d31965a4b715e854 Added Reference https://github.com/nats-io/nats-server/commit/e611ca9604697b02d8f22beb76037400a9cf72e6 Added Reference https://github.com/nats-io/nats-server/releases/tag/v2.11.16 Added Reference https://github.com/nats-io/nats-server/releases/tag/v2.12.7 Added Reference https://github.com/nats-io/nats-server/releases/tag/v2.14.0 Added Reference https://github.com/nats-io/nats-server/security/advisories/GHSA-wh7g-5m82-pmhr