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CVE-2026-58213

HIGH
7.1
CVSS 3.1
Description
NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system. Prior to 2.14.1 and 2.12.9, an MQTT client could include protocol control characters in subscription filters that were later forwarded as NATS protocol data to route or leafnode connections, corrupting the forwarded protocol stream and allowing injection of unintended NATS protocol operations. This issue is fixed in versions 2.14.1 and 2.12.9.

Metadata

CVE ID
CVE-2026-58213
State
PUBLISHED
Assigner
GitHub_M
Reserved
2026-06-29 17:09 UTC
Published
2026-07-08 19:52 UTC
Last updated
2026-07-08 19:52 UTC
Primary CWE
CWE-74
CWE-74: Improper Neutralization of Special Elements in Outpu…
Vendor / Product
nats-io / nats-server
Sources
cve.org  ·  NVD

Severity & Metrics

7.1 HIGH CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N
Affected products (1)
VendorProductPlatformVersions
nats-io nats-server — < 2.12.9, >= 2.14.0-RC.1, < 2.14.1
Weakness (CWE)
CWESourceDescription
CWE-74 cna CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
CVSS scores (1)
ScoreSeverityVersionSourceVector
7.1 HIGH 3.1 cna CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N
References (8)
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