8.2
High
CVE-2026-103602 Improper certificate validation in PkixNameConstraintValidator in Legion of the Bouncy Castle Inc
Description
Improper certificate validation in PkixNameConstraintValidator in Legion of the Bouncy Castle Inc. bc-csharp before 2.7.0 allows an attacker who controls, or can obtain certificates from, a name-constrained intermediate CA to have certificates accepted during PKIX certification path validation for email addresses, DNS names or URI hosts that lie within excluded subtrees applying to that CA, via an rfc822Name, dNSName or uniformResourceIdentifier name whose host ends with a dot, because names and constraints were compared without first removing the RFC 1034 root-label trailing dot, so a fully qualified host name did not match an excluded subtree for the same host written without the dot.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| bc-csharp 2.7 | earliest → < 2.7.0 | 2.7.0 |
Other CVEs of bc-csharp
The 21 CVEs of bc-csharp →
CVE-2026-103604
Inefficient algorithmic complexity in X.509 distinguished name string conversion (X509Name.ToString and…
8.7
High
CVE-2026-103603
Memory allocation with excessive size value in the HSS/LMS signature code (HssPublicKeyParameters, HssSignature) in…
8.7
High
CVE-2026-103601
Release of unverified plaintext in the CCM (CcmBlockCipher) and DSTU 7624 CCM (KCcmBlockCipher) AEAD modes in Legion…
8.2
High
CVE-2026-103600
Uncontrolled recursion in the ASN.1 parser (Asn1InputStream, Asn1StreamParser) in Legion of the Bouncy Castle Inc
8.7
High