SEPTEMBER 19, 2026
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Case File

CVE-2026-64785

MEDIUM · CVSS 5.3 EPSS 0.18% Public Exploit

Source: NVD + CISA KEV + EPSS · Published 2026-07-23 · Last synced 2026-08-22

CyberRota Analysis

AI-Generated

The vulnerability in SwiftNIO HTTP/2 allows unvalidated inbound HEADERS frames to pass control characters to an HTTP/1.1 backend, potentially leading to HTTP request smuggling or response splitting attacks. Organizations using affected versions of SwiftNIO HTTP/2 should prioritize updating to version 1.45.0 to mitigate the risk of exploitation. This issue is particularly relevant for developers and system administrators managing HTTP/2 traffic in their applications.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

GitHub PoC Links

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2026-64785
Severity
MEDIUM
CVSS
5.3
EPSS
0.18%

Original NVD 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.