CVE-2026-86589

0.0

Apache Answer: User Center integration does not revoke first-login sessions after central account suspension

Overview
Vulnerability Timeline

Overview

Description

Incorrect implementation of authentication algorithm vulnerability in Apache Answer. This issue affects Apache Answer: through 2.0.2. A flaw in the User Center login integration can cause a newly created external user session to omit its external identity, allowing subsequent requests to bypass central account suspension or deletion checks until the session expires or is revoked. Users are recommended to upgrade to version 2.0.3, which fixes the issue.

Details

INFO

Published Date :

Oct. 19, 2026, 10:16 a.m.

Last Modified :

Oct. 19, 2026, 11:17 a.m.

Remotely Exploit :

No

Source :

[email protected]

Impact

Affected Products

The following products are affected by CVE-2026-86589 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID	Vendor	Product	Action
1	Apache	answer

: Total Affected Vendor : 1 | Products : 1

Solution

Upgrade Apache Answer to version 2.0.3 to fix authentication bypass.

Upgrade Apache Answer to version 2.0.3.

References

References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2026-86589.

URL	Resource
https://lists.apache.org/thread/t8mbzfolzlqz4z5hcwq3v0lnwjqb2tl5
http://www.openwall.com/lists/oss-security/2026/10/16/33

CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-86589 is associated with the following CWEs:

CWE-303: Incorrect Implementation of Authentication Algorithm

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-86589 weaknesses.

CAPEC-90: Reflection Attack in Authentication Protocol Reflection Attack in Authentication Protocol

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2026-86589 vulnerability anywhere in the article.

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2026-86589 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

CVE Modified by af854a3a-2127-422b-91ae-364da2661108

Oct. 19, 2026

Action	Type	Old Value	New Value
Added	Reference		http://www.openwall.com/lists/oss-security/2026/10/16/33

New CVE Received by [email protected]