CVE-2026-43820
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
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.
| Vendor | apple |
| Product | swift-nio-ssl |
| Ecosystems | |
| Industries | Technology |
| Published | Jul 23, 2026 |
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Affected Versions
Apple / swift-nio-ssl
0 < 2.37.2