Is there a public exploit for CVE-2026-93566?

No public exploit for CVE-2026-93566 was found in Exploit-DB, Metasploit, Nuclei templates or public proof-of-concept repositories. That is an absence of evidence rather than proof that none exists.

How severe is CVE-2026-93566?

CVE-2026-93566 scores CVSS 6.5 (v3.1), rated medium. EPSS puts the chance of exploitation in the next 30 days at 0.48%.

What does CVE-2026-93566 affect?

CVE-2026-93566 affects Red Hat Red Hat build of Keycloak 26.4.

6.5 Medium

A flaw was found in Netty.

CVE-2026-93566

A flaw was found in Netty. A remote attacker could exploit this by sending a specially crafted HTTP request that includes control characters within the chunk-size line. This bypasses the intended strict validation, allowing the attacker to inject arbitrary HTTP requests. This vulnerability can lead to HTTP request smuggling, potentially resulting in information disclosure or other unauthorized actions.

Assessment

CVSS: 6.5 (v3.1)
Severity: Medium
EPSS: 0.48% chance of exploitation in the next 30 days
Known exploited: Not listed in CISA KEV
Exploit availability: Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published: 18 September 2026
Last updated: 6 November 2026
Affected: Red Hat · Red Hat build of Keycloak 26.4
Assigner: redhat

CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

At the source

EUVD (ENISA)

References

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