Vulnerability Details CVE-2026-64785
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.002
EPSS Ranking 7.7%
CVSS Severity
CVSS v3 Score 5.3
Products affected by CVE-2026-64785
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cpe:2.3:a:apple:swiftnio_http/2:0.1.0
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cpe:2.3:a:apple:swiftnio_http/2:0.2.0
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cpe:2.3:a:apple:swiftnio_http/2:0.2.1
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cpe:2.3:a:apple:swiftnio_http/2:1.0.0
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cpe:2.3:a:apple:swiftnio_http/2:1.0.1
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cpe:2.3:a:apple:swiftnio_http/2:1.1.0
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cpe:2.3:a:apple:swiftnio_http/2:1.10.0
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cpe:2.3:a:apple:swiftnio_http/2:1.11.0
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cpe:2.3:a:apple:swiftnio_http/2:1.12.0
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cpe:2.3:a:apple:swiftnio_http/2:1.12.1
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cpe:2.3:a:apple:swiftnio_http/2:1.12.2
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cpe:2.3:a:apple:swiftnio_http/2:1.12.3
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cpe:2.3:a:apple:swiftnio_http/2:1.13.0
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cpe:2.3:a:apple:swiftnio_http/2:1.14.0
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cpe:2.3:a:apple:swiftnio_http/2:1.14.1
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cpe:2.3:a:apple:swiftnio_http/2:1.14.2
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cpe:2.3:a:apple:swiftnio_http/2:1.15.0
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cpe:2.3:a:apple:swiftnio_http/2:1.16.0
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cpe:2.3:a:apple:swiftnio_http/2:1.16.1
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cpe:2.3:a:apple:swiftnio_http/2:1.16.2
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cpe:2.3:a:apple:swiftnio_http/2:1.16.3
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cpe:2.3:a:apple:swiftnio_http/2:1.17.0
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cpe:2.3:a:apple:swiftnio_http/2:1.18.0
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cpe:2.3:a:apple:swiftnio_http/2:1.18.1
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cpe:2.3:a:apple:swiftnio_http/2:1.18.2
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cpe:2.3:a:apple:swiftnio_http/2:1.18.3
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cpe:2.3:a:apple:swiftnio_http/2:1.18.4
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cpe:2.3:a:apple:swiftnio_http/2:1.18.5
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cpe:2.3:a:apple:swiftnio_http/2:1.19.0
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cpe:2.3:a:apple:swiftnio_http/2:1.19.1
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cpe:2.3:a:apple:swiftnio_http/2:1.19.2
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cpe:2.3:a:apple:swiftnio_http/2:1.2.0
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cpe:2.3:a:apple:swiftnio_http/2:1.2.1
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cpe:2.3:a:apple:swiftnio_http/2:1.20.0
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cpe:2.3:a:apple:swiftnio_http/2:1.20.1
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cpe:2.3:a:apple:swiftnio_http/2:1.21.0
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cpe:2.3:a:apple:swiftnio_http/2:1.22.0
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cpe:2.3:a:apple:swiftnio_http/2:1.22.1
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cpe:2.3:a:apple:swiftnio_http/2:1.23.0
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cpe:2.3:a:apple:swiftnio_http/2:1.23.1
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cpe:2.3:a:apple:swiftnio_http/2:1.24.0
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cpe:2.3:a:apple:swiftnio_http/2:1.24.1
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cpe:2.3:a:apple:swiftnio_http/2:1.25.0
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cpe:2.3:a:apple:swiftnio_http/2:1.25.1
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cpe:2.3:a:apple:swiftnio_http/2:1.25.2
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cpe:2.3:a:apple:swiftnio_http/2:1.26.0
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cpe:2.3:a:apple:swiftnio_http/2:1.27.0
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cpe:2.3:a:apple:swiftnio_http/2:1.28.0
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cpe:2.3:a:apple:swiftnio_http/2:1.28.1
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cpe:2.3:a:apple:swiftnio_http/2:1.29.0
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cpe:2.3:a:apple:swiftnio_http/2:1.3.0
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cpe:2.3:a:apple:swiftnio_http/2:1.30.0
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cpe:2.3:a:apple:swiftnio_http/2:1.31.0
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cpe:2.3:a:apple:swiftnio_http/2:1.32.0
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cpe:2.3:a:apple:swiftnio_http/2:1.33.0
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cpe:2.3:a:apple:swiftnio_http/2:1.34.0
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cpe:2.3:a:apple:swiftnio_http/2:1.34.1
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cpe:2.3:a:apple:swiftnio_http/2:1.35.0
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cpe:2.3:a:apple:swiftnio_http/2:1.36.0
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cpe:2.3:a:apple:swiftnio_http/2:1.37.0
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cpe:2.3:a:apple:swiftnio_http/2:1.38.0
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cpe:2.3:a:apple:swiftnio_http/2:1.39.0
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cpe:2.3:a:apple:swiftnio_http/2:1.39.1
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cpe:2.3:a:apple:swiftnio_http/2:1.4.0
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cpe:2.3:a:apple:swiftnio_http/2:1.40.0
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cpe:2.3:a:apple:swiftnio_http/2:1.41.0
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cpe:2.3:a:apple:swiftnio_http/2:1.42.0
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cpe:2.3:a:apple:swiftnio_http/2:1.43.0
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cpe:2.3:a:apple:swiftnio_http/2:1.44.1
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cpe:2.3:a:apple:swiftnio_http/2:1.5.0
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cpe:2.3:a:apple:swiftnio_http/2:1.6.0
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cpe:2.3:a:apple:swiftnio_http/2:1.6.1
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cpe:2.3:a:apple:swiftnio_http/2:1.7.0
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cpe:2.3:a:apple:swiftnio_http/2:1.7.1
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cpe:2.3:a:apple:swiftnio_http/2:1.7.2
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cpe:2.3:a:apple:swiftnio_http/2:1.8.0
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cpe:2.3:a:apple:swiftnio_http/2:1.9.0
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cpe:2.3:a:apple:swiftnio_http/2:1.9.1