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    CVE-2026-15432

    When verifying a mac with a ChunkedMacVerification object, Tink compares the resulting tag with non constant time comparison. This potentially allows an attacker to use timinig information as a side channel in order to get information how many bytes of a given tag match the correct tag. This in turn could allow to find a correct tag bytewise.

    Published:Jul 21, 2026
    Last Modified:Jul 27, 2026
    EPS:Jul 21, 2026
    EPSS Score:0.00185
    CVSS Score:8.2

    Affected Products

    Vendor
    Google
    Product
    Tink Android
    Vendor
    Google
    Product
    Tink Java

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-208 Observable Timing Discrepancy

    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