CVE-2026-64785 - Vulnerability Details - OpenCVE

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.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact Low

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00135.

Exploitation none

Automatable yes

Technical Impact partial

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Apple

swift-nio-http2

affected

Version	Status	Constraints
`0`	affected	< 1.45.0

No data.

No data.

No data.

Project Subscriptions

No data.

Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References

Link	Providers
https://github.com/apple/swift-nio-http2/security/advisories/GHSA-q3g2-m552-3r9c

History

Fri, 24 Jul 2026 20:30:00 +0000

Type	Values Removed	Values Added
Weaknesses		CWE-444
Metrics		cvssV3_1 `{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N'}` ssvc `{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Thu, 23 Jul 2026 21:45:00 +0000

Type	Values Removed	Values Added
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.
References		https://github.com/apple/swift-nio-http2/security/advisories/GHSA-q3g2-m552-3r9c

Projects

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MITRE

Status: PUBLISHED

Assigner: apple

Published: 2026-07-23T18:50:40.468Z

Updated: 2026-07-24T20:06:58.518Z

Reserved: 2026-07-20T18:11:03.398Z

Link: CVE-2026-64785

Vulnrichment

Updated: 2026-07-24T20:05:52.056Z

NVD

No data.

Redhat

No data.

OpenCVE Enrichment

No data.

Weaknesses

CWE-444

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