CVE-2026-43827

Summary

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.

Affected Software

VendorProductVersion RangeStatus
Apache Software FoundationApache Shiro1.0 <= 2.1.0affected
Apache Software FoundationApache Shiro3.0.0-alpha-0 <= 3.0.0-alpha-1affected

Weaknesses

  • CWE-384: CWE-384 Session Fixation

ADP Enrichment

CVE Program Container

Additional References

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

References