What’s Vulnerable › Vulnerabilities

CVE-2020-4068: Heap-based Buffer Overflow in APNSwift

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-06-22 · updated 2026-06-17
• Weakness: CWE-122

Description

In APNSwift 1.0.0, calling APNSwiftSigner.sign(digest:) is likely to result in a heap buffer overflow. This has been fixed in 1.0.1.

Affected products

• kylebrowning APNSwift: 1.0.0

References

• https://github.com/kylebrowning/APNSwift/commit/97fa7f69dcdd89168fff84e0ba8f999881ee3d3f
• https://github.com/kylebrowning/APNSwift/issues/31
• https://github.com/kylebrowning/APNSwift/pull/32
• https://github.com/kylebrowning/APNSwift/security/advisories/GHSA-qh2w-vjxg-mjcg
• https://github.com/kylebrowning/APNSwift/commit/97fa7f69dcdd89168fff84e0ba8f999881ee3d3f
• https://github.com/kylebrowning/APNSwift/issues/31
• https://github.com/kylebrowning/APNSwift/pull/32
• https://github.com/kylebrowning/APNSwift/security/advisories/GHSA-qh2w-vjxg-mjcg

Get alerted when CVE-2020-4068 or the next vulnerability affects your stack