CVE-2026-58253Disclosure(linuxfoundation / nats-server)

LOWCVSS 8.8 · HIGH

Signal is active with 1 mentions in latest observed window

Immediate actions

  • Track advisory updates for patch or workaround availability

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 2.14.0, 2.12.7, and 2.11.16, when no_auth_user was configured, a parser fast path intended for ordinary client connections could also apply to route or leafnode listeners, allowing an unauthenticated peer to bypass inter-server CONNECT authentication and operate with the privileges associated with that connection type. This issue is fixed in versions 2.14.0, 2.12.7, and 2.11.16.

0.0/ 10 priority

Sources & remediation

Weakness type (CWE)
CWE-287

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

  • 1 mentions across 1 observed day

What's happening

  • Technical details provided in 1 signal
  • Disclosure: 1 classified signal
  • 1 total mentions across 1 day

Affected systems

Products
nats-server

Deep dive

Activity timeline1 mentions / 1d
00111Mentions · 2026-07-13: 1Technical Details · 2026-07-13: 107-13
Signal classification1 categories
Disclosure
1100.0%
Referenced assets1 URL
Full discourse1 post
  • DailyCVE@dailycve
    Disclosure

    🟠 NATS Server, Improper Authentication, #CVE-2026-58253 (Medium) -DC-Jul2026-926 https://dailycve.com/nats-server-improper-authentication-cve-2026-58253-medium-dc-jul2026-926/

    Post summary

    The text announces the CVE‑2026‑58253 for NATS Server, noting an improper authentication flaw with a medium severity rating, but provides no evidence of PoC, exploitation, or remediation.

    0000042
    218 followersView on X
CPE platform detail1 entries

1 of 1 entries

PartVendorProductVersionTarget SWTarget HW
Applinuxfoundationnats-server---

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