CVE-2026-64785
Medium · 5.3CVSS
5.3
EPSS
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Published
Jul 23, 2026
CISA due date
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The record
SwiftNIO HTTP/2 was missing validation on inbound HEADERS frames that let CR, LF, NUL, SP and other control characters reach an HTTP/1.1 backend through NIOHTTP2's HTTP/2-to-HTTP/1 codec, enabling HTTP request smuggling or response splitting. This vulnerability is addressed in swift-nio-http2 version 1.45.0.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
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