Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
Sources: National Vulnerability Database, CISA KEV, Exploit-DB
CVE-2026-79633 Overview
CVE-2026-79633 is a missing authorization vulnerability in Apache Answer, an open-source question-and-answer platform. The flaw affects all versions through 2.0.2. Authenticated users can perform actions on non-public content they are not permitted to access.
The issue is categorized under [CWE-202: Exposure of Sensitive Information Through Data Queries]. The Apache Software Foundation fixed the issue in version 2.0.3.
Critical Impact
Authenticated users can interact with restricted, non-public content in Apache Answer deployments, bypassing intended access controls on private questions, answers, and related resources.
Affected Products
- Apache Answer versions through 2.0.2
- Apache Answer 2.0.3 contains the fix
- Self-hosted Apache Answer community platforms
Discovery Timeline
- 2026-10-19 - CVE-2026-79633 published to NVD
- 2026-10-19 - Last updated in NVD database
Technical Details for CVE-2026-79633
Vulnerability Analysis
Apache Answer fails to enforce authorization checks on operations targeting non-public content. The server validates that a user is authenticated but does not consistently verify whether the authenticated user holds permission to view or modify the specific resource being requested.
This gap allows horizontal privilege escalation across tenant boundaries, groups, or private spaces within the platform. An attacker with a standard account can enumerate and act on resources intended for restricted audiences. The flaw aligns with [CWE-202], where data queries expose information that should remain restricted.
Root Cause
The root cause is missing authorization logic on content-handling endpoints. Apache Answer relies on authentication state as a sufficient precondition for several actions without applying per-object permission checks. Non-public items in restricted areas therefore become reachable by any logged-in account.
Attack Vector
Exploitation requires an authenticated session on a vulnerable Apache Answer instance. The attacker issues requests against endpoints that reference non-public resource identifiers. Because authorization is not evaluated per resource, the server processes the request and returns or modifies the targeted content.
For technical details, consult the Apache Mailing List Thread and the OpenWall OSS Security Notice.
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Stop Identity AttacksDetection Methods for CVE-2026-79633
Indicators of Compromise
- Requests from low-privilege user accounts targeting resource IDs tied to private questions, answers, or restricted groups.
- Unexpected modifications, votes, or state changes on non-public content attributed to users outside the authorized audience.
- Elevated request rates against object-ID endpoints suggesting enumeration of non-public resources.
Detection Strategies
- Review Apache Answer application logs for authenticated requests that return success responses on resources outside the user's assigned groups.
- Correlate user role data with accessed object IDs to identify authorization mismatches.
- Instrument web application firewall (WAF) rules to flag sequential access to numeric or sequential resource identifiers.
Monitoring Recommendations
- Forward Apache Answer access and audit logs to a centralized logging platform for ongoing analysis.
- Alert on bulk read or write operations against private content from a single account.
- Track user-to-resource access patterns and baseline normal behavior per role.
How to Mitigate CVE-2026-79633
Immediate Actions Required
- Upgrade Apache Answer to version 2.0.3 immediately on all production and staging deployments.
- Audit recent application logs for unauthorized access to non-public content prior to patching.
- Rotate session tokens and review account privileges after upgrading.
Patch Information
The Apache Software Foundation addressed CVE-2026-79633 in Apache Answer 2.0.3. The release introduces the missing authorization checks on affected content operations. Administrators should review the Apache Mailing List Thread for the official announcement and upgrade guidance.
Workarounds
- No vendor-provided workaround exists; upgrading to 2.0.3 is the recommended remediation.
- Restrict network access to the Apache Answer instance to trusted users while planning the upgrade.
- Temporarily disable self-registration to limit the pool of authenticated accounts able to exploit the flaw.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
Sources: National Vulnerability Database, CISA KEV, Exploit-DB
