Dashboard / CVE-2026-58209

CVE-2026-58209

MEDIUM
MEDIUM Priority: 0.01 BB Relevance: 59/100
Published: 2026-07-08 Modified: 2026-10-25 First seen: 2026-10-29 Status: active

Attack Surface

Network Low Complexity No Interaction

CVSS Vector Breakdown

AV: Network
AC: Low
PR: Low
UI: None
S: Unchanged
C: Low
I: None
A: None

Description

NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system. Prior to 2.14.3 and 2.12.12, MQTT retained message delivery and QoS1+ durable replay could deliver messages whose original topics matched a subscriber configured subscribe deny rule because these delivery paths did not consistently recheck the concrete original topic before sending the MQTT PUBLISH to the subscriber. This issue is fixed in versions 2.14.3 and 2.12.12.

Weakness Classification (1)

Affected Software (1)

VendorProductVersion
linuxfoundation nats-server < 2.12.12

References & Advisories (5)

Bug Bounty Relevance

59 / 100
✓ Network accessible
✓ Low complexity
✓ No user interaction

CVSS Score

4.3 / 10.0 v3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

EPSS — Exploitation Probability

0.34%
Raw Score 0.003420
Percentile 27.7%
Date 2026-10-29

EPSS Trend

2026-10-29
0.00342
2026-10-28
0.00342

Intelligence Sources

nvd ref →

External Links