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CVE-2026-43828 Apache Software Foundation CVE debrief

Apache Shiro versions 1.0 through 2.1.0 and 3.0.0-alpha-1 fail to set the 'Secure' attribute on sensitive session cookies (JSESSIONID) and Remember-Me cookies by default. When applications are deployed over HTTPS, this omission allows browsers to transmit these cookies over unencrypted HTTP connections if available, exposing session identifiers to potential interception. The vulnerability stems from default configuration rather than implementation flaws, affecting Shiro's native session manager and Remember-Me functionality. The CVSS 4.0 vector indicates network attack vector with low attack complexity, requiring user interaction and partial attacker positioning, with high confidentiality impact on victim data but no direct integrity or availability impact.

Vendor
Apache Software Foundation
Product
Apache Shiro
CVSS
MEDIUM 5.9
CISA KEV
Not listed in stored evidence
Original CVE published
2026-05-25
Original CVE updated
2026-07-24
Advisory published
2026-05-25
Advisory updated
2026-07-24

Who should care

Organizations running Apache Shiro 1.0-2.1.0 or 3.0.0-alpha-1 with HTTPS deployments; security teams responsible for session management hardening; developers configuring Shiro-based authentication

Technical summary

The vulnerability exists in Shiro's default Cookie configuration where the 'secure' property is not enabled by default. When applications operate over HTTPS, browsers should only transmit cookies marked with the Secure attribute over encrypted channels. Without this attribute, if an application is accessible via both HTTP and HTTPS, or if a user is directed to an HTTP endpoint, the session cookie may be transmitted in cleartext. This is classified under CWE-614 (Sensitive Cookie in HTTPS Session Without 'Secure' Attribute). The fix in versions 2.1.1 and 3.0.0-alpha-2 changes default behavior to set the Secure attribute appropriately.

Defensive priority

medium

Recommended defensive actions

  • Upgrade Apache Shiro to version 2.1.1 or 3.0.0-alpha-2 or later per vendor guidance
  • If immediate upgrade is not feasible, configure Shiro's Cookie class to set secure=true explicitly for session and Remember-Me cookies
  • Verify cookie security attributes using browser developer tools or HTTP inspection
  • Review application deployment to ensure HTTPS-only access where session cookies are used
  • Audit existing session management configurations for hardcoded insecure cookie settings

Evidence notes

Official Apache Shiro security advisory confirms affected versions and fix releases. NVD entry undergoing analysis as of source capture.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-43828 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-43828

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-43828 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-43828

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.