What’s Vulnerable › Vulnerabilities

CVE-2026-43823

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-07-23 · updated 2026-10-24
• Weakness: CWE-415

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.

Affected products

• Apple swift-crypto: from 3.2.0 through 4.5.1

References

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

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