CVE-2026-93575

HIGHPre-NVD 7.57.5—
EchelonGraph scoreHIGH confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-09-18. a secondary CVSS source baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: ghsa, secondary
Trending — 4 sources updated this week
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: —CVSS: 7.5Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

A flaw was found in Netty's MqttDecoder. An unauthenticated remote attacker can exploit this vulnerability by sending a specially crafted MQTT CONNECT packet. The decoder fails to properly validate the 'Properties Length' against the 'Remaining Length', allowing an attacker to bypass size limits. This leads to excessive memory and CPU consumption, resulting in a denial of service (DoS) due to an OutOfMemoryError.

CVSS v3
7.5
EG Score
7.5(high)
EG Risk
38(Track)
EG Risk 38/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity75% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
—
EPSS %ILE
—
KEV
Not listed

Published

September 18, 2026

Last Modified

September 18, 2026

Advisory Details (1)

Auto-updated Sep 18, 2026
No patch confirmed yet. Sources: redhat.
redhat

2536967 – (CVE-2026-93575) CVE-2026-93575 io.netty/netty-codec-mqtt: Netty: Resource Exhaustion in MqttDecoder

https://bugzilla.redhat.com/show_bug.cgi?id=2536967

Vendor Advisories for CVE-2026-93575(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 14× in last 7d / 14× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-09-18 21:28 UTCEG score recompute
  2. 2026-09-18 21:28 UTCGHSA enrichment
  3. 2026-09-18 20:31 UTCEG score recompute
  4. 2026-09-18 20:31 UTCGHSA enrichment
  5. 2026-09-18 19:08 UTCEG score recompute
  6. 2026-09-18 19:08 UTCGHSA enrichment
  7. 2026-09-18 14:21 UTCEG score recompute
  8. 2026-09-18 14:21 UTCGHSA enrichment
  9. 2026-09-18 13:29 UTCEG score recompute▲ 7.50
  10. 2026-09-18 13:29 UTCGHSA enrichment
  11. 2026-09-18 13:29 UTCMITRE cvelistV5CVSS v3 → 7.5 · severity → HIGH
  12. 2026-09-18 11:19 UTCNVD update
  13. 2026-09-18 11:04 UTCEG score recompute
  14. 2026-09-18 11:04 UTCMITRE cvelistV5first tracked

Frequently asked(4)

What is CVE-2026-93575?
CVE-2026-93575 is a high vulnerability published on September 18, 2026. A flaw was found in Netty's MqttDecoder. An unauthenticated remote attacker can exploit this vulnerability by sending a specially crafted MQTT CONNECT packet. The decoder fails to properly validate the 'Properties Length' against the 'Remaining Length', allowing an attacker to bypass size limits.…
When was CVE-2026-93575 disclosed?
CVE-2026-93575 was first published in the National Vulnerability Database on September 18, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
What is the CVSS score of CVE-2026-93575?
CVE-2026-93575 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-93575?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-93575, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-93575

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