CVE-2026-93566

Summary

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.

Affected Software

Weaknesses

• CWE-1035: CWE-1035

Workarounds

See https://github.com/netty/netty/security/advisories/GHSA-rq4j-fc47-9698 for fixed versions and remediation guidance.

References

• https://access.redhat.com/security/cve/CVE-2026-93566
• https://bugzilla.redhat.com/show_bug.cgi?id=2536954

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