CVEvulnerability
CVE-2026-43820
7.7 HIGH
Official page ↗
- Status
- Analyzed
- Published
- 2026-07-23
- Last modified
- 2026-10-24
- Assigner
- [email protected]
- CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0)
- 7.7 HIGH — CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
- Weaknesses
- CWE-125
Description
NIOSSLCertificate._subjectAlternativeNames provides access to the raw bytes for a cert's SANs. NIOSSL provides access to a buffer assumed to be backed by an ASN1_STRING, but not all SANs are backed by ASN1_STRING, so accessing the buffer for such a type can lead to out-of-bounds memory access. This vulnerability is addressed in swift-nio-ssl version 2.37.2.
Affected configurations
• apple swiftnio ssl (>= 2.18.0 < 2.37.2)
Related
Weakness · CWE (1)
- CWE-125 Out-of-bounds Read weakness
References
- https://github.com/apple/swift-nio-ssl/security/advisories/GHSA-xfxg-9975-pc2j Vendor Advisory, Exploit
- https://github.com/apple/swift-nio-ssl/security/advisories/GHSA-xfxg-9975-pc2j Vendor Advisory, Exploit