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TI-2026-31916 Aliases CVE-2026-43827GHSA-fcvm-3cpj-f9qx

Apache Shiro: Session fixation: new session is not created after login by default

Priority LOW 27CWE-384Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Active
Attack complexity
Low
Attack requirements
Present
Impact type
Spoofing
Confidentiality · integrity · availability
High · None · None
Fix status
Partial Red Hat: 1 without a fix

Attack profile from CVSS 4.0 · CNA. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-384.

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00412 35th percentileScored 2026-11-07
Fix Partial org.apache.shiro:shiro-core (Maven): 2.2.0, 3.0.0-alpha-2Red Hat: 1 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
ApacheApache Shiro1.0 – 2.1.0; 3.0.0-alpha-0 – 3.0.0-alpha-1—No fix listedCNA
—org.apache.shiro:shiro-core (Maven)1.0.0-incubating to before 2.2.02.2.0Patch availableGHSA-fcvm-3cpj-f9qx
—org.apache.shiro:shiro-core (Maven)3.0.0-alpha-1 to before 3.0.0-alpha-23.0.0-alpha-2Patch availableGHSA-fcvm-3cpj-f9qx
  • Apache Shiro VendorApache Affected 1.0 – 2.1.0; 3.0.0-alpha-0 – 3.0.0-alpha-1 Fixed in — No fix listed CNA
  • org.apache.shiro:shiro-core (Maven) Vendor— Affected 1.0.0-incubating to before 2.2.0 Fixed in 2.2.0 Patch available GHSA-fcvm-3cpj-f9qx
  • org.apache.shiro:shiro-core (Maven) Vendor— Affected 3.0.0-alpha-1 to before 3.0.0-alpha-2 Fixed in 3.0.0-alpha-2 Patch available GHSA-fcvm-3cpj-f9qx

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:apache:shiro:*:*:*:*:*:*:*:*before 2.1.1VulnerableApache
cpe:2.3:a:apache:shiro:3.0.0:alpha1:*:*:*:*:*:*3.0.0 alpha1VulnerableApache
  • cpe:2.3:a:apache:shiro:*:*:*:*:*:*:*:* Versions before 2.1.1 Vulnerable ·Apache
  • cpe:2.3:a:apache:shiro:3.0.0:alpha1:*:*:*:*:*:* Versions 3.0.0 alpha1 Vulnerable ·Apache

Remediation

  • Fix · GHSA-fcvm-3cpj-f9qx org.apache.shiro:shiro-core (Maven) Fixed in 2.2.0 Advisory →
  • Fix · GHSA-fcvm-3cpj-f9qx org.apache.shiro:shiro-core (Maven) Fixed in 3.0.0-alpha-2 Advisory →

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Advisory ·

    Apache Shiro — shiro.apache.org/security-reports.html

    3 records Highest priority Priority LOW 3 LOW

    Other records, highest priority first

    • TI-2026-31917 Apache Shiro: Shiro's native session and rememberMe cookies do not have secure flag set by defaultPriority LOW 26
    • TI-2026-35945 Apache Shiro: Jakarta EE open redirect via untrusted Referer in post-login redirect flowPriority LOW 3
    Show all 3 records → Advisory →

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Fuse 7AffectedNo fix planned: Out of support scope
Not affected: 1 product
  • Red Hat JBoss Enterprise Application Platform Expansion Pack

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-43827
  2. 2026-10-03 Alias added: GHSA-fcvm-3cpj-f9qx

References

Advisory 3

Other 1

  • TI-2016-03813 Apache Shiro before 1.2.5, when a cipher key has not been configured for the "remember… KEVCVSS 3.1CRITICAL 9.8
  • TI-2020-13272 Improper authentication in Apache Shiro CVSS 3.1CRITICAL 9.8
  • TI-2021-18132 Improper authentication in Apache Shiro CVSS 3.1CRITICAL 9.8
  • TI-2022-14167 Authentication bypass in Apache Shiro CVSS 3.1CRITICAL 9.8
  • TI-2020-09649 Improper authentication in Apache Shiro CVSS 3.1CRITICAL 9.8
  • TI-2020-10910 Apache Shiro before 1.6.0, when using Apache Shiro, a specially crafted HTTP request may cause an authentication bypass. CVSS 3.1HIGH 7.5
See all 24 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences