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    CVE-2026-8763

    In Bouncy Castle for Java before 1.85, Name Constraints bypass via trailing dot in rfc822Name and URI. This issue also affects Bouncy Castle for Java LTS before 2.73.12, and Bouncy Castle for Java FIPS (BC-FJA) before bc-fips 1.0.2.7 (1.0.X series), 2.0.2 (2.0.X series) and 2.1.3 (2.1.X series).

    Published:Aug 3, 2026
    Last Modified:Sep 2, 2026
    EPS:Aug 3, 2026
    EPSS Score:0.0043
    CVSS Score:9.1

    Affected Products

    Vendor
    Bouncycastle
    Product
    Bc-java
    Vendor
    Bouncycastle
    Product
    Bouncy Castle For Java Lts
    Vendor
    Bouncycastle
    Product
    Fips Java Api
    Vendor
    Legion Of The Bouncy Castle Inc.
    Product
    Bc-fja
    Vendor
    Legion Of The Bouncy Castle Inc.
    Product
    Bc-java
    Vendor
    Legion Of The Bouncy Castle Inc.
    Product
    Bc-lts-java

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-295 Improper Certificate Validation

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    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High