Apache Answer Users Must Patch to Stop Stale Tokens Accessing Private Files
A session flaw in Apache Answer through 2.0.2 allows revoked users to access private uploads until version 2.0.3 is deployed.
Key points
- CVE-2026-79624 affects Apache Answer versions up to and including 2.0.2.
- Revoked users can retain access to private files using stale visit tokens.
- The vendor released version 2.0.3 to fix this insufficient session expiration issue.
Managed service providers must update Apache Answer installations immediately to version 2.0.3. The software contains a session handling flaw that permits users with revoked credentials to continue accessing private uploaded files. This vulnerability, identified as CVE-2026-79624, stems from insufficient session invalidation logic within the application. According to the official advisory, the issue affects all versions of Apache Answer through 2.0.2.
How it unfolded
- Enxin Xie posted the official advisory to the oss-security mailing list on October 15.
- The advisory details how stale visit tokens retain access even after a user session is revoked.
- Maksim Hayder is credited as the reporter who discovered and disclosed this security issue.
Who is affected
Any organization running Apache Answer version 2.0.2 or earlier is exposed to this risk. The flaw allows attackers or former employees with revoked accounts to bypass standard session controls. Specifically, these individuals can use old visit tokens to download or view private files that were previously uploaded to the system. The vulnerability is rated as moderate severity.
Our take on the response
The vendor has already released a fix in version 2.0.3. This rapid turnaround limits the window of exposure for most users. However, the persistence of access via stale tokens highlights the importance of rigorous session management in web applications. Teams should verify their current version status before assuming protection.
Who needs to act first
Teams usually prioritize systems exposed to the public internet or those handling sensitive data. Check whether your environment uses older versions of the software before applying changes. Roll out updates to a small subset of servers first to ensure stability. Back up configuration files and databases before making any changes to the application. Monitor logs for unusual access patterns during the transition period to detect any ongoing misuse of stale tokens.
What to do and how to stay safe: Apache Answer
- Audit all Apache Answer installations to identify those running version 2.0.2 or earlier.
- Upgrade affected systems to version 2.0.3 as soon as operational windows allow.
- Review access logs for any suspicious downloads or visits from revoked user accounts.
- Verify that session termination procedures are functioning correctly after the upgrade.
Step-by-step guide: Vulnerability Prioritization: How to Rank Risks Without Wasting Time
General security guidance from the Patch Observer newsroom. It is not confirmed advice from the organisations named in this story.
Frequently asked questions
What is the CVE ID for this Apache Answer vulnerability?
The vulnerability is tracked as CVE-2026-79624.
Which versions of Apache Answer are affected by this flaw?
All versions of Apache Answer through 2.0.2 are affected by this session expiration issue.
Is there a fix available for CVE-2026-79624?
Yes, users are recommended to upgrade to version 2.0.3, which fixes the issue.
