# Apple SwiftNIO vulnerabilities

Source: https://junglewise.ai/threats/technologies/swiftnio  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Updated: 11 November 2026, 03:07 UTC. Rebuilt every hour.  
Data: https://junglewise.ai/threats/technologies/swiftnio.json  
License: CC BY 4.0 with a link back

Junglewise Threat Intelligence has tracked 4 vulnerabilities in Apple SwiftNIO: 0 in the last 7 days and 1 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2026-43678, was published on 20 August 2026. Nothing was published in the last eight weeks.

## Counts

- Last 7 days: 0
- Last 30 days: 0
- Last 90 days: 1
- All time: 4 (0 critical, 0 exploited in the wild)

## About Apple SwiftNIO

SwiftNIO is a cross-platform asynchronous event-driven network application framework for rapid development of maintainable high performance protocol servers and clients.

## Latest Apple SwiftNIO vulnerabilities

- [CVE-2026-43678: Apple swift-nio WebSocket denial of service via oversize payload length](https://junglewise.ai/threats/cve-2026-43678-apple-swift-nio-websocket-denial-of-service-via-oversize-payload) (medium, CVSS 5.3, published 20 Aug 2026)
- [CVE-2026-28980: Apple SwiftNIO uncontrolled resource consumption in HTTPDecoder](https://junglewise.ai/threats/cve-2026-28980-apple-swiftnio-uncontrolled-resource-consumption-in-httpdecoder) (high, CVSS 8.7, published 12 Jun 2026)
- [CVE-2026-43671: Apple SwiftNIO out-of-bounds write in ByteBuffer](https://junglewise.ai/threats/cve-2026-43671-apple-swiftnio-out-of-bounds-write-in-bytebuffer) (high, CVSS 8.3, published 12 Jun 2026)
- [CVE-2026-28970: Apple SwiftNIO CRLF injection in HTTP validator handlers](https://junglewise.ai/threats/cve-2026-28970-apple-swiftnio-crlf-injection-in-http-validator-handlers) (medium, CVSS 6.3, published 12 Jun 2026)

## Most severe Apple SwiftNIO vulnerabilities

- [CVE-2026-28980: Apple SwiftNIO uncontrolled resource consumption in HTTPDecoder](https://junglewise.ai/threats/cve-2026-28980-apple-swiftnio-uncontrolled-resource-consumption-in-httpdecoder) (high, CVSS 8.7, published 12 Jun 2026)
- [CVE-2026-43671: Apple SwiftNIO out-of-bounds write in ByteBuffer](https://junglewise.ai/threats/cve-2026-43671-apple-swiftnio-out-of-bounds-write-in-bytebuffer) (high, CVSS 8.3, published 12 Jun 2026)
- [CVE-2026-28970: Apple SwiftNIO CRLF injection in HTTP validator handlers](https://junglewise.ai/threats/cve-2026-28970-apple-swiftnio-crlf-injection-in-http-validator-handlers) (medium, CVSS 6.3, published 12 Jun 2026)
- [CVE-2026-43678: Apple swift-nio WebSocket denial of service via oversize payload length](https://junglewise.ai/threats/cve-2026-43678-apple-swift-nio-websocket-denial-of-service-via-oversize-payload) (medium, CVSS 5.3, published 20 Aug 2026)

## Vulnerabilities per week

Nothing was published in the last eight weeks.

| Week of | Vulns | Critical | Exploited |
| --- | --- | --- | --- |
| 17 Aug 2026 | 1 | 0 | 0 |
| 24 Aug 2026 | 0 | 0 | 0 |
| 31 Aug 2026 | 0 | 0 | 0 |
| 7 Sep 2026 | 0 | 0 | 0 |
| 14 Sep 2026 | 0 | 0 | 0 |
| 21 Sep 2026 | 0 | 0 | 0 |
| 28 Sep 2026 | 0 | 0 | 0 |
| 5 Oct 2026 | 0 | 0 | 0 |
| 12 Oct 2026 | 0 | 0 | 0 |
| 19 Oct 2026 | 0 | 0 | 0 |
| 26 Oct 2026 | 0 | 0 | 0 |
| 2 Nov 2026 | 0 | 0 | 0 |
| 9 Nov 2026 | 0 | 0 | 0 |

## Other Apple technologies

- [Apple macOS](https://junglewise.ai/threats/technologies/macos): 1,496 vulnerabilities
- [Apple iPadOS](https://junglewise.ai/threats/technologies/ipados): 739 vulnerabilities
- [Apple visionOS](https://junglewise.ai/threats/technologies/visionos): 457 vulnerabilities
- [Apple macOS Golden Gate](https://junglewise.ai/threats/technologies/macos-golden-gate): 449 vulnerabilities
- [Apple watchOS](https://junglewise.ai/threats/technologies/watchos): 386 vulnerabilities
- [Apple tvOS](https://junglewise.ai/threats/technologies/tvos): 353 vulnerabilities
- [Apple Ios](https://junglewise.ai/threats/technologies/apple-ios): 206 vulnerabilities
- [Apple Iphone Os](https://junglewise.ai/threats/technologies/iphone-os): 203 vulnerabilities
- [Apple Safari](https://junglewise.ai/threats/technologies/safari): 189 vulnerabilities
- [Apple Multiple Products](https://junglewise.ai/threats/technologies/multiple-products): 77 vulnerabilities
- [Apple macOS Ventura](https://junglewise.ai/threats/technologies/macos-ventura): 27 vulnerabilities
- [Apple macOS Monterey](https://junglewise.ai/threats/technologies/macos-monterey): 24 vulnerabilities

## Sources

NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories. Rebuilt every hour. Cite as: Junglewise Threat Intelligence, "Apple SwiftNIO vulnerabilities", https://junglewise.ai/threats/technologies/swiftnio, 11 November 2026.