TI-2026-23009 Aliases CVE-2026-28815 GHSA-9m44-rr2w-ppp7

Out-of-bounds read in Apple macOS

HIGH 72CWE-125Published 2026-04-03 · Updated 2026-04-03

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Denial of service
Confidentiality · integrity · availability: None · None · High
Fix status: Fixed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and GitHub. Impact type from CWE-125 and the CVSS impact.

Summary

A remote attacker can supply a short X-Wing HPKE encapsulated key and trigger an out-of-bounds read in the C decapsulation path, potentially causing a crash or memory disclosure depending on runtime protections. This issue is fixed in swift-crypto version 4.3.1.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.0049 42nd percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix Fixed macOS (Apple): 4.3.1swift-crypto (SwiftURL): 4.3.1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: Yes
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Apple	macOS	4.0.0 to before 4.3.1	4.3.1	Patch available	CNA
—	swift-crypto (SwiftURL)	4.0.0 to before 4.3.1	4.3.1	Patch available	GHSA-9m44-rr2w-ppp7

macOS VendorApple Affected 4.0.0 to before 4.3.1 Fixed in 4.3.1 Patch available CNA
swift-crypto (SwiftURL) Vendor— Affected 4.0.0 to before 4.3.1 Fixed in 4.3.1 Patch available GHSA-9m44-rr2w-ppp7

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:apple:swift-crypto::::::swift::*	4.0.0 to before 4.3.1	Vulnerable	Apple

cpe:2.3:a:apple:swift-crypto:*:*:*:*:*:swift:*:* Versions 4.0.0 to before 4.3.1 Vulnerable ·Apple

Remediation

Fix · CNA macOS (Apple) Fixed in 4.3.1
Fix · GHSA-9m44-rr2w-ppp7 swift-crypto (SwiftURL) Fixed in 4.3.1 Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2026-28815
2026-10-03 Alias added: GHSA-9m44-rr2w-ppp7

References

TI-2026-31912 Double free in Apple swift-crypto CVSS 3.1HIGH 7.5

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences