CVE-2026-93558

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 — 3 sources updated this weekElevated
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: Elevated riskExposed: 0

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

Unbounded Per-Connection Queue Growth in WebSocketServerExtensionHandler Leads to Denial of Service

CVSS v3
7.5
EG Score
7.5(high)
EG Risk
65(Attend)
EG Risk 65/100SSVC: Attend

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%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
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

2536932 – (CVE-2026-93558) CVE-2026-93558 io.netty/netty-codec-http: Netty: Unbounded Per-Connection Queue Growth in WebSocketServerExtensionHandler Leads to Denial of Service

https://bugzilla.redhat.com/show_bug.cgi?id=2536932

Vendor Advisories for CVE-2026-93558(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 6× in last 7d / 6× 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 19:08 UTCEG score recompute
  2. 2026-09-18 19:08 UTCGHSA enrichment
  3. 2026-09-18 15:25 UTCEG score recompute
  4. 2026-09-18 14:59 UTCEG score recompute
  5. 2026-09-18 14:24 UTCEG score recompute
  6. 2026-09-18 14:24 UTCMITRE cvelistV5first tracked

Frequently asked(4)

What is CVE-2026-93558?
CVE-2026-93558 is a high vulnerability published on September 18, 2026. Unbounded Per-Connection Queue Growth in WebSocketServerExtensionHandler Leads to Denial of Service
When was CVE-2026-93558 disclosed?
CVE-2026-93558 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-2026-93558?
CVE-2026-93558 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-93558?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-93558, 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-2026-93558

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