CVE-2026-64785

EUVD-2026-48369
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.
HTTP Request/Response Smuggling
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
5.3 MEDIUM
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: 7.72%
Affected Products (NVD)
VendorProductVersion
appleswiftnio_http/2
𝑥
< 1.45.0
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
https://github.com/apple/swift-nio-http2/security/advisories/GHSA-q3g2-m552-3r9c