NATS Server: MQTT partial CONNECT packets can exhaust pre-auth memory (nats-io nats-server)

CVE-2026-58210

HIGH 7.5

En bref

Source: NVD
EPSS: EPSS 0.74 % · centile 55 (2026-11-01)
État: PUBLISHED
Publiée: 2026-07-08 20:13 UTC
Mise à jour: 2026-07-09 13:29 UTC
Attribuée par: GitHub_M
Statut NVD: Analyzed

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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.

Faiblesses (CWE)

CWE-400 — Consommation de ressources non maîtrisée (déni de service)

Références

Scores

Version	Score	Vecteur	Évalué par
CVSS 3.1	HIGH 7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	GitHub_M
CVSS 3.1	HIGH 7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	NVD · security-advisories@github.com (Secondary)

Références européennes

ENISA EUVD · EUVD-2026-42348
GCVE · GCVE-0-2026-58210

Configurations affectées (CPE NVD)

cpe:2.3:a:linuxfoundation:nats-server:*:*:*:*:*:*:*:* < 2.12.12
cpe:2.3:a:linuxfoundation:nats-server:*:*:*:*:*:*:*:* ≥ 2.14.0 < 2.14.3

Produits affectés

Produit	Versions
nats-io · nats-server	affected < 2.12.12 ; affected >= 2.14.0-RC.1, < 2.14.3

Sources

Source	Licence
CVE List (CVEProject cvelistV5)	CVE Program Terms of Use
EPSS (FIRST.org)	FIRST — attribution requested
ENISA EUVD	ENISA — reproduction authorised, source acknowledged
NVD (NIST) via fkie-cad/nvd-json-data-feeds	Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD

⚠️ NATS Server: MQTT partial CONNECT packets can exhaust pre-auth memory (nats-io nats-server)