CVE-2026-43823

HIGH

Apple swift-crypto < 4.5.1 - RSA Public Key Double-Free

Title source: manual

Description

When initializing an RSA public key from DER or PEM bytes throws an error, the EVP_PKEY* is double-freed: first in the catch block, then in the deinit. This can lead to a crash on future memory allocations. This double-free manifests when BoringSSL cannot decode the public key from the bytes provided. This vulnerability is addressed in swift-crypto version 4.5.1.

References (1)

Core 1

Core References

https://github.com/apple/swift-crypto/security/advisories/GHSA-8q93-f6xh-4f6f

Scores

CVSS v3 7.5

EPSS 0.0026

EPSS Percentile 17.1%

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-415

Status published

Products (1)

Apple/swift-crypto < 4.5.1

Published Jul 23, 2026

Tracked Since Jul 23, 2026