CVE-2026-93561

MEDIUMPre-NVD 6.56.5—
EchelonGraph scoreHIGH confidence

Score 6.5 from GitHub Security Advisory published 2026-09-18. a secondary CVSS source baseline 6.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: ghsa, secondary
Trending — 4 sources updated this week
6.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: —CVSS: 6.5Exploit: 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 io.netty/netty-codec-memcache. The Memcache binary protocol codec incorrectly reads keyLength and extrasLength as signed Java types instead of unsigned, as specified by the protocol. A malicious Memcache server can exploit this type mismatch by sending a specially crafted response. This can lead to frame desynchronization and response smuggling, where one client's data may be inadvertently exposed to another client's response stream in proxy or cache environments.

CVSS v3
6.5
EG Score
6.5(high)
EG Risk
44(Track)
EG Risk 44/100SSVC: 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
Severity65% × 45%
Exploitation0% × 40%
Automatability100% × 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

2536949 – (CVE-2026-93561) CVE-2026-93561 io.netty/netty-codec-memcache: Netty: Memcache binary codec signed/unsigned type mismatch causes frame desynchronization and response smuggling

https://bugzilla.redhat.com/show_bug.cgi?id=2536949

Vendor Advisories for CVE-2026-93561(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 19× in last 7d / 19× 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 15:25 UTCEG score recompute
  8. 2026-09-18 15:25 UTCGHSA enrichment
  9. 2026-09-18 14:59 UTCEG score recompute
  10. 2026-09-18 14:59 UTCGHSA enrichment
  11. 2026-09-18 14:21 UTCEG score recompute
  12. 2026-09-18 14:21 UTCGHSA enrichment
  13. 2026-09-18 13:34 UTCGHSA enrichment
  14. 2026-09-18 13:29 UTCEG score recompute▲ 6.50
  15. 2026-09-18 13:29 UTCGHSA enrichment
  16. 2026-09-18 13:29 UTCMITRE cvelistV5CVSS v3 → 6.5 · severity → MEDIUM
  17. 2026-09-18 11:19 UTCNVD update
  18. 2026-09-18 10:24 UTCEG score recompute
  19. 2026-09-18 10:24 UTCMITRE cvelistV5first tracked

Frequently asked(4)

What is CVE-2026-93561?
CVE-2026-93561 is a medium vulnerability published on September 18, 2026. A flaw was found in io.netty/netty-codec-memcache. The Memcache binary protocol codec incorrectly reads keyLength and extrasLength as signed Java types instead of unsigned, as specified by the protocol. A malicious Memcache server can exploit this type mismatch by sending a specially crafted…
When was CVE-2026-93561 disclosed?
CVE-2026-93561 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-2026-93561?
CVE-2026-93561 has a CVSS v3 base score of 6.5 (NVD).
How do I remediate CVE-2026-93561?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-93561, 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-2026-93561

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