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    CVE-2026-50055

    A policy-enforcement flaw in Zimbra Collaboration Suite allows an authenticated user to bypass disabled mail forwarding by using a Sieve notify action to send copies of email content and headers to an arbitrary address.

    Published:Oct 8, 2026
    Last Modified:Oct 8, 2026
    EPS:Oct 8, 2026
    EPSS Score:
    CVSS Score:6.5

    Affected Products

    Vendor
    Zimbra
    Product
    Zimbra Collaboration Suite

    Exploits

    https://github.com/HORKimhab/CVE-2026-50055

    Common Weakness Enumeration

    CWE-863 Incorrect Authorization

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

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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