External risk intelligence

Apache Answer Session Expiration Vulnerability Allows Unauthorized Access to Private Files.

CVE advisorySeverity: CRITICAL (CVSS 9.8)

CVE-2026-79624

Apache Answer is a Q&A platform typically deployed as a public-facing web application. Since it is designed to be accessible to users over the internet for collaboration, the web interface and associated session management components are commonly exposed to the public internet.

Halo Surface Signal: 4 out of 5 — likely to be public-facing.

External exposure likelihood

Horizon Alert

Summary of the vulnerability and why it matters

A recently identified vulnerability in Apache Answer, a Q&A platform, could allow unauthorized access to private files if session information is not properly invalidated. While the specific impact depends on how the platform is deployed and used, this type of weakness can weaken security controls. The main concern is confirming relevance and exposure to your organization.

Stale session tokens may expose private files.
It affects an external-facing Q&A platform.
Confirm if Apache Answer is in use.

Attack Path

How an attacker could exploit the issue

An attacker could exploit this vulnerability by leveraging a stale visit token to access private files, even after their session has been revoked. This allows unauthorized access to sensitive information that should have been protected. The vulnerability lies in insufficient session invalidation within the Apache Answer application.

No authentication required to find vulnerable instance.
A revoked user can trigger the vulnerability.
Unauthorized access to private files.

Live Threat

Current exploitation, exposure, and threat context

This vulnerability in Apache Answer could allow revoked users to access private files they are no longer authorized to view, provided they retain a stale visit token. This could potentially expose sensitive information shared within the application.

Private uploaded files at risk.
Stale tokens enable unauthorized access.
Sensitive information could be exposed.

Operational Fix

Recommended remediation, mitigation, and detection steps

Real-World Ownership

For this critical vulnerability in Apache Answer, platform or application owners are primarily responsible for managing the affected instances. The first practical step is to identify all deployments of Apache Answer within your environment, assess their exposure and business criticality, and then confirm the accountable owner for each instance to coordinate remediation.

Platform/application owners should manage.
Verify deployment exposure and criticality first.
Plan coordinated remediation based on risk.

Supplementary metadata

CVSS vector

Validate whether this threat affects your internet-facing exposure.

Halo Threat Intelligence helps prioritize remediation with Halo Surface Signal and H/A/L/O context. Start exposure validation with a free external attack surface trial.

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Frequently asked questions

What is Apache Answer?

Apache Answer is an open-source platform designed to facilitate knowledge sharing through a question-and-answer interface. It is commonly utilized by organizations to create community-driven support portals or internal knowledge bases where users upload content and collaborate on technical topics.

How does the session invalidation issue in CVE-2026-79624 work?

This vulnerability relates to CWE-613, or Insufficient Session Expiration. It means the application fails to properly terminate a user's access rights when their session is revoked. Consequently, a user who should no longer be authorized can continue to use their old, stale token to view private files uploaded to the platform.

Do I need an active account to trigger this vulnerability?

No, you do not need an active account to trigger this. The flaw relies on the application's failure to recognize that a previously valid session token has been cancelled. If a user was once authorized and retains a stale token, the system incorrectly honors that token, whereas standard account activities or new, unauthorized guests cannot exploit this specific path.

Is my Apache Answer instance at risk according to Halo Surface Signal?

Halo Surface Signal identifies that because Apache Answer is typically deployed as a public-facing web application for collaboration, its session management components are often exposed to the internet. If your instance is reachable over the public web, it is considered higher risk as it is inherently available to external network traffic.

When should I prioritize fixing this vulnerability?

You should prioritize this by first locating all deployments of Apache Answer within your organization. Once identified, assess the sensitivity of the files stored on each instance. Coordinate with the responsible application owner to plan an update to version 2.0.3, which resolves the session management flaw.

References

Written by Nicholas Merritt

Nicholas Merritt is VP of Security Solutions at Halo Security. With more than 25 years across application security, vulnerability prioritization, and offensive security, he helps teams translate threat data into practical exposure validation and remediation focus. He authors Halo Threat Intelligence CVE advisories using Halo Surface Signal and H/A/L/O context to prioritize internet-facing risk.