CVE-2026-63576: bc-csharp 0 to before 2.7.0

Affected technology

bc-csharp · 0 to before 2.7.0
Legion of the Bouncy Castle Inc.

Description’s affected range: before 2.7.0

Component: Not specified by the source
File: crypto/src/pkix/PkixNameConstraintValidator.cs, crypto/src/pkix/NameConstraintUtilities.cs, crypto/src/pkix/NameConstraintUri.cs

Attack conditions (Source advisory, CVSS 4.0): Network (remote) · No privileges required · No user interaction required

What an attacker can do

Source advisory’s CVSS 4.0 assessment (base score 8.2/10) rates confidentiality and availability impact as none; integrity impact as high. The description does not specify what an attacker can achieve beyond these rated impacts.