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© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-2026-58252

34
FAUCET Score

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.

First published: Jul 8, 2026Last modified: Jul 8, 2026

Impacted Technologies

VendorProductVersion(s)CPE
< 2.11.16CPE matchmatch criteria
cpe:2.3:a:linuxfoundation:nats-server:*:*:*:*:*:*:*:*
>= 2.12.0, < 2.12.7CPE matchmatch criteria
cpe:2.3:a:linuxfoundation:nats-server:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.5MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.34%
Probability of exploitation in next 30 days
EPSS Percentile
26.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0034 is in the 35th percentile among its peer group of 21,958 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

microsoftpatch availablevia msrc
Product: azl3 telegraf 1.31.0-23 on Azure Linux 3.0Fixed in: 1.31.0-24
microsoftpatch availablevia msrc
Product: 21481-17084Fixed in: 1.31.0-24

Vendor Advisories (1)

microsoft2026-Jul/CVE-2026-58252Moderate

NATS Server: Subscribe Authz Bypass via Wildcard-Overlap

Jul 2, 2026

References

github.com / nats-io/nats-server/commit/8ced85a11497f86704a95d960281480ce037386b
Patch
github.com / nats-io/nats-server/commit/a42a6d1e258eb5c3a2190384d31965a4b715e854
Patch
github.com / nats-io/nats-server/commit/e611ca9604697b02d8f22beb76037400a9cf72e6
Patch
github.com / nats-io/nats-server/releases/tag/v2.11.16
Release Notes
github.com / nats-io/nats-server/releases/tag/v2.12.7
Release Notes
github.com / nats-io/nats-server/releases/tag/v2.14.0
Release Notes
github.com / nats-io/nats-server/security/advisories/GHSA-wh7g-5m82-pmhr
Vendor Advisory