CVE-2026-28815

HIGH

macOS 4.0.0-4.3.0 - Out-of-bounds Read via HPKE Decapsulation

Title source: llm

Description

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.

References (1)

Core 1

Core References

https://github.com/apple/swift-crypto/security/advisories/GHSA-9m44-rr2w-ppp7

Scores

CVSS v3 7.5

EPSS 0.0047

EPSS Percentile 37.0%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment

Exploitation poc

Automatable yes

Technical Impact partial

Details

CWE

CWE-125

Status published

Products (3)

Apple/macOS 4.0.0 - 4.3.1

apple/swift-crypto 4.0.0 - 4.3.1

SwiftURL/swift-crypto 4.0.0 - 4.3.1SwiftURL

Published Apr 03, 2026

Tracked Since Apr 03, 2026