CVE-2026-82378 Apache Software Foundation CVE debrief

Who should care

Administrators and users of Apache Roller 6.1.5 installations with OAuth 1.0a site-wide consumer configurations should assess exposure and upgrade to Apache Roller 6.1.6 or later to prevent unauthorized authorization binding.

Why it matters

CVE-2026-82378 is a critical vulnerability in Apache Roller 6.1.5's OAuth 1.0a authorization endpoint that allows unauthorized authorization binding. Administrators and users of affected installations should assess exposure and upgrade to Apache Roller 6.1.6 or later to prevent potential unauthorized access and elevation of privileges.

• Potential unauthorized access to user accounts, including administrators
• Possible elevation of privileges through authorization binding
• Requires verification of OAuth 1.0a site-wide consumer configurations and outstanding request tokens
• Upgrade to Apache Roller 6.1.6 or later to prevent exploitation

Technical summary

The vulnerability in Apache Roller 6.1.5's OAuth 1.0a authorization endpoint allows an unauthenticated remote attacker to bind an outstanding request token for a site-wide consumer to an arbitrary user account, including administrators. This requires knowledge of one of the outstanding request tokens and only affects installations that configure an OAuth 1.0a site-wide consumer. The endpoint derives the authorizing identity from a request-supplied value rather than the authenticated session. Users are recommended to upgrade to Apache Roller 6.1.6 or later, which binds authorization to the logged-in session.

Defensive priority

Upgrade to Apache Roller 6.1.6 or later to prevent unauthorized authorization binding.

Recommended defensive actions

• Upgrade to Apache Roller 6.1.6 or later
• Review and update OAuth 1.0a site-wide consumer configurations
• Monitor for suspicious authorization requests
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.
• Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance.
• Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed.
• Check relevant monitoring, detection, and logs for exposed assets that need extra review.

Evidence notes

The CVE record and NVD detail page provide information on the vulnerability, its impact, and recommended actions. This issue affects installations that configure an OAuth 1.0a site-wide consumer and requires knowledge of one of its outstanding request tokens. Evidence is limited to public CVE and NVD sources. Defenders should verify OAuth 1.0a site-wide consumer configurations, outstanding request tokens, and upgrade to Apache Roller 6.1.6 or later to prevent exploitation.

Sources and 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.