CVE-2026-64785
Last modified
CVE-2026-64785 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. 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.. EPSS estimates a 0.18% chance of exploitation in the next 30 days.
Description
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.
Metrics
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Apple | Swiftnio Http\/2 | < 1.45.0 |
References
- https://github.com/apple/swift-nio-http2/security/advisories/GHSA-q3g2-m552-3r9cVendor Advisory, Patch
Timeline
- Published
- Last Modified
- Status
- Analyzed
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