CVE-2026-93569

HIGHPre-NVD 8.28.2—
EchelonGraph scoreHIGH confidence

Score 8.2 from GitHub Security Advisory (severity: HIGH) published 2026-09-18. a secondary CVSS source baseline 8.2; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
8.2EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.2Exploit: 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. A remote unauthenticated attacker can exploit a vulnerability in Netty's HTTP/1 to HTTP/2 conversion process. When an HTTP/1 request includes both an absolute-form request-target and a conflicting Host header, Netty incorrectly prioritizes the Host header for the HTTP/2 :authority field, discarding the original request-target authority. This inconsistency can allow an attacker to bypass security controls in Netty-based proxies or gateways, potentially leading to unauthorized access, cache poisoning, or misrouting of requests.

CVSS v3
8.2
EG Score
8.2(high)
EG Risk
42(Track)
EG Risk 42/100SSVC: 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
Severity82% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
31%
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

2536962 – (CVE-2026-93569) CVE-2026-93569 io.netty/netty-codec-http2: HTTP/1 absolute-form Host mismatch is translated to HTTP/2 :authority, overriding the request-target authority

https://bugzilla.redhat.com/show_bug.cgi?id=2536962

Vendor Advisories for CVE-2026-93569(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 15× in last 7d / 15× 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. 2026-09-19 20:02 UTCEG score recompute
  2. 2026-09-19 20:02 UTCGHSA enrichment
  3. 2026-09-19 08:45 UTCGHSA enrichment
  4. 2026-09-18 21:28 UTCEG score recompute
  5. 2026-09-18 21:28 UTCGHSA enrichment
  6. 2026-09-18 20:29 UTCEG score recompute
  7. 2026-09-18 20:28 UTCGHSA enrichment
  8. 2026-09-18 19:27 UTCGHSA enrichment
  9. 2026-09-18 19:08 UTCEG score recompute
  10. 2026-09-18 19:08 UTCGHSA enrichment
  11. 2026-09-18 18:49 UTCEG score recompute
  12. 2026-09-18 18:49 UTCGHSA enrichment
  13. 2026-09-18 15:24 UTCEG score recompute
  14. 2026-09-18 14:34 UTCEG score recompute
  15. 2026-09-18 14:34 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-93569?
CVE-2026-93569 is a high vulnerability published on September 18, 2026. A flaw was found in Netty. A remote unauthenticated attacker can exploit a vulnerability in Netty's HTTP/1 to HTTP/2 conversion process. When an HTTP/1 request includes both an absolute-form request-target and a conflicting Host header, Netty incorrectly prioritizes the Host header for the HTTP/2…
When was CVE-2026-93569 disclosed?
CVE-2026-93569 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.
Is CVE-2026-93569 actively exploited?
CVE-2026-93569 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 68.9% of all scored CVEs.
What is the CVSS score of CVE-2026-93569?
CVE-2026-93569 has a CVSS v3 base score of 8.2 (NVD).
How do I remediate CVE-2026-93569?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-93569, 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-2026-93569

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