VulnSocial

CVE-2026-58210Patch(linuxfoundation / nats-server)

LOWCVSS 7.5 · HIGH

Signal is active with 1 mentions in latest observed window

Immediate actions

  • Patch linuxfoundation nats-server systems immediately

Recommended action window: Monitor and triage in normal cycle

NVD 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, an unauthenticated MQTT client could cause the server to retain large incomplete MQTT CONNECT packets before authentication completed, consuming server memory while the parser waited for the advertised MQTT packet length. This issue is fixed in versions 2.14.3 and 2.12.12.

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0.5/ 10 priority

Sources & remediation

Patch / fix
Vendor / third-party advisories
Other references
Weakness type (CWE)
CWE-400

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

AVAILABLE

Momentum

NONE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

  • nats-server

Threat summary

  • Patch or workaround signal is available
  • 1 mentions across 1 observed day

What's happening

  • Patch or workaround mentioned in 1 signal
  • Technical details provided in 1 signal
  • 1 total mentions across 1 day

Affected systems

Vendors
linuxfoundation
Products
nats-server

Deep dive

Activity timeline1 mentions / 1d
00111Mentions · 2026-07-09: 1Patch / Workaround · 2026-07-09: 1Technical Details · 2026-07-09: 107-09
Signal classification1 categories
Patch
1100.0%
Referenced assets1 URL
By indicator
Full discourse1 post
  • Hugo | DevOps | Cybersecurity 🇱🇻@HugoValters
    Patch

    #CVE-2026-58210 - High severity supply chain risk in #Nats #Server. Unauthenticated #MQTT clients can exhaust memory via incomplete CONNECT packets. #CVSS 7.5. Update to 2.14.3 or 2.12.12 immediately. #CVEAlert #devsecops #devops #sysadmin #linux #github #git #infosec https://www.valtersit.com/cve/CVE-2026-58210/

    Post summary

    CVE-2026-58210 is a high‑severity memory exhaustion flaw in NATS Server triggered by incomplete MQTT CONNECT packets, rated CVSS 7.5, and requires an immediate upgrade to versions 2.14.3 or 2.12.12.

    0001053
    974 followersView on X
CPE platform detail1 entries

1 of 1 entries

PartVendorProductVersionTarget SWTarget HW
Applinuxfoundationnats-server---

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