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    CVE-2026-41509

    CROSS implementation contains reference and optimized implementations of the CROSS post-quantum signature algorithm. Prior to commit fc6b7e7, there is a buffer overflow in crypto_sign_open() caused by an underflow of the integer mlen. This issue has been patched via commit fc6b7e7.

    Published:May 8, 2026
    Last Modified:May 12, 2026
    EPS:May 8, 2026
    EPSS Score:0.00042
    CVSS Score:9.8

    Affected Products

    Vendor
    Cross-crypto
    Product
    Cross-implementation
    Vendor
    Cross-signature
    Product
    Cross-implementation

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-92 Forced Integer Overflow

    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