CVE-2026-86589
Apache Answer: User Center integration does not revoke first-login sessions after central account suspension
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
Apache Answer: User Center integration does not revoke first-login sessions after central account suspension
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.
- Record
CVE-2026-86589- CVSS 3.1
- 5.4 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N - Weakness
- CWE-303
- Updated
- 2026-11-02
EUVDEUVD-2026-104164
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.
- Record
EUVD-2026-104164- CVSS 3.1
- 5.4 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-9w3m-gv8w-f7ww
Incorrect implementation of authentication algorithm vulnerability in Apache Answer. This...
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.
- Record
GHSA-9w3m-gv8w-f7ww- CVSS 3.1
- 5.4 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N - Weakness
- CWE-303
- Updated
- 2026-11-02
NVD
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.
- Record
CVE-2026-86589- CVSS 3.1
- 5.4 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N - Weakness
- CWE-303
- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-86589 is a medium vulnerability (CVSS 5.4) in Apache Software Foundation Answer, published October 19, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.25%, the 16th percentile. No source names a fixed version.