What is the CVSS score of CVE-2026-64785?

CVE-2026-64785 has a CVSS 3.1 base score of 5.3 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N. EPSS exploitation probability: 0.1%.

Is there a patch available for CVE-2026-64785?

Yes, a patch is available for CVE-2026-64785. Update the affected software to the latest version immediately.

Swift Nio Http2 CVE-2026-64785

EUVD-2026-48369 MEDIUM

HTTP Request/Response Smuggling (CWE-444)

2026-07-23 apple

GHSA-q3g2-m552-3r9c

Information Disclosure Apple Request Smuggling Swift Nio Http2

5.3

CVSS 3.1 · Vendor: apple

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Vulnerability Assessment

Weakness

CWE

CWE-444

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).

Patch available 0.1% exploitation probability (EPSS)

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AnalysisAIv1 – Jul 26, 2026

HTTP request smuggling in SwiftNIO HTTP/2 allows unauthenticated remote attackers to inject headers or split responses via crafted HTTP/2 HEADERS frames that pass control characters through the HTTP/2-to-HTTP/1.1 codec. The vulnerability, caused by missing CR/LF/NUL/SP validation in regular header values and pseudo-headers, can be exploited when outbound validation is disabled or headers are forwarded without rechecking. Fixed in version 1.45.0; no public exploit identified at time of analysis and EPSS score is 0.14% (low).

Affected VersionsENISA

swift-nio-http2 0 <1.45.0

Affected Packages

euvd swift_nio_http2 fix: 1.45.0

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in euvd

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

Vendor (apple) PRIMARY 5.3 MEDIUM

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Red Hat 5.3 LOW

Primary rating from Vendor (apple).

CVSS VectorVendor: apple

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

Low

Availability

None

Lifecycle Timeline

Patch available

Jul 23, 2026 - 23:03 EUVD

CVE Published

Jul 23, 2026 - 18:50 cve.org

UNKNOWN (no severity yet)

CVE Published

Jul 23, 2026 - 18:50 cve.org

MEDIUM 5.3

DescriptionCVE.org

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.

Threat Intelligence Overview

EPSS Score

0.1%

Top 97% exploitable

Threat Intel

1 sources

Data Quality

8 sources

Confidence: High

EUVD 🇯🇵JVN

NVD

CVE.org

EPSS

Vulnrichment GHSA Vendor

GitHub

VulDB

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity MEDIUM

CISA KEV No

Public POC No

EPSS 0.1%

Patch available Yes

Active threat No

Deciding rule

MEDIUM severity (CVSS 4.0-6.9)

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived

Scheduled

Exploitation

None

System Exposure· derived

Open

Automatable

Yes

Human Impact· derived

Medium

Technical Impact

Partial

Priority Score

Low Medium High Critical

KEV: 0

EPSS: 0

CVSS: +26

PoC: 0

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Attack Technique

HTTP Request Smuggling HIGH

HTTP request smuggling exploits inconsistencies in how front-end and back-end servers parse HTTP message boundaries.

Information Disclosure MEDIUM

Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.