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Tracking
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Tue, 06 Oct 2026 20:30:00 +0000
| Type | Values Removed | Values Added |
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| Metrics |
ssvc
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Sun, 04 Oct 2026 22:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Legion Of The Bouncy Castle Inc.
Legion Of The Bouncy Castle Inc. bc-csharp |
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| Vendors & Products |
Legion Of The Bouncy Castle Inc.
Legion Of The Bouncy Castle Inc. bc-csharp |
Fri, 02 Oct 2026 07:30:00 +0000
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| Description | Improper certificate validation in the directoryName name-constraint check (PkixNameConstraintValidator.WithinDNSubtree) in Legion of the Bouncy Castle Inc. bc-csharp before 2.7.0 allows an attacker who controls, or can have certificates issued by, a name-constrained intermediate CA to get certificates accepted by PKIX path validation whose subject distinguished name, or a directoryName subjectAltName, lies outside the CA's permitted subtrees, via a name that places other RDNs ahead of a copy of the permitted RDN sequence, because the check looks for the constraint's first RDN anywhere in the name and compares the remaining RDNs from that position, instead of requiring the constraint to be an initial prefix of the name as RFC 5280 sections 4.2.1.10 and 7.1 require. | |
| Title | Name Constraints bypass: directoryName constraint matched at any position in the DN instead of as a prefix | |
| Weaknesses | CWE-295 | |
| References |
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| Metrics |
cvssV4_0
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Status: PUBLISHED
Assigner: bcorg
Published:
Updated: 2026-10-06T19:31:34.111Z
Reserved: 2026-07-16T23:51:51.306Z
Link: CVE-2026-63577
Updated: 2026-10-06T19:21:26.413Z
Status : Undergoing Analysis
Published: 2026-10-02T08:17:02.937
Modified: 2026-10-06T20:17:28.537
Link: CVE-2026-63577
No data.
OpenCVE Enrichment
Updated: 2026-10-04T20:55:26Z
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CWE-295
Improper Certificate Validation