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    CVE-2026-43827

    Default configurations of Apache Shiro have a session fixation vulnerability. This issue affects Apache Shiro from 1.0 to 2.1.0, and 3.0.0-alpha-1. Users are recommended to upgrade to version 2.1.1, or 3.0.0-alpha-2 or later, which fixes the issue. In the affected versions, when a session already exists, it is not invalidated upon successful login, nor is a new session being generated with a new ID.

    Published:May 25, 2026
    Last Modified:May 28, 2026
    EPS:May 25, 2026
    EPSS Score:0.00041
    CVSS Score:6.5

    Affected Products

    Vendor
    Apache
    Product
    Shiro

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-384 Session Fixation

    Related CVEs

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    CVE-2026-44598 (CVSS 5.1) — With valid login credentials, URL Redirection to Untrusted Site ('Open Redirect'), Server-Side Request Forgery…
    CVE-2026-43828 (CVSS 5.9) — Default configurations of Apache Shiro send sensitive cookies in HTTPS session without 'Secure' attribute. …
    CVE-2026-23901 (CVSS 1) — Observable Timing Discrepancy vulnerability in Apache Shiro. This issue affects Apache Shiro: from 1.*, 2.* b…
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    CVE-2023-46749 (CVSS 6.5) — Apache Shiro before 1.13.0 or 2.0.0-alpha-4, may be susceptible to a path traversal attack that results in an …

    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