CVE-2026-86532: Apache TomEE: Username enumeration and timing side channel in JAAS login modules
- Is it exploited?
Not on CISA's list. CISA has not added it to the Known Exploited Vulnerabilities catalog as of . If CISA adds it, this page shows it as known exploited.
- How likely is exploitation in the next 30 days?
- 0.2%
EPSS score, percentile 10 of all scored records. A probability estimated by FIRST, not a report of exploitation.
- How severe?
- Not scored
The CVE record carries no CVSS score.
- What should I do?
CISA has set no required action, because the vulnerability is not in KEV.
- Which versions are affected?
Affected
- 4.0.0-beta-1 through 4.7.5
- from 7.0.0-M1 to before 10.0.0-M1
- from 10.0.0-M1 to before 10.3.0
- from 11.0.0-M1 to before 11.0.0-M2
Source: CISA KEV 2026.11.10, as of ; FIRST EPSS, as of ; CVE List, as of . About the data.
Description
Apache TomEE: Username enumeration and timing side channel in JAAS login modules
The bundled JAAS login modules leak whether a username exists and compare credentials in a non-constant-time manner. A remote unauthenticated attacker can enumerate valid accounts and may infer credential material through timing analysis. Users are recommended to upgrade to version 10.3.0 or 11.0.0-M2, which fix the issue.
Source: CVE List, as of . About the data.
What to do
Advisories and patches
This summary is based on the CVE record as of . Check the vendor's advisory before you act: affected versions and fixes can change.
Affected products and versions
Versions by product, as listed in the CVE record (2 products)
| Status | Versions |
|---|---|
| Affected | 4.0.0-beta-1 through 4.7.5 |
Versions not listed are: unaffected.
| Status | Versions |
|---|---|
| Affected | from 7.0.0-M1 to before 10.0.0-M1 |
| Affected | from 10.0.0-M1 to before 10.3.0 |
| Affected | from 11.0.0-M1 to before 11.0.0-M2 |
Versions not listed are: unaffected.
Source: CVE List, as of . About the data.
Weakness
CWE-203
- CWE-203: Observable Discrepancy
CWE and CAPEC are maintained by MITRE; the entries are those named in the CVE record.
Timeline
| Date | Event |
|---|---|
| CVE record published |
Known exploited Apache vulnerabilities
- CVE-2016-3081: Apache Struts Command Injection Vulnerability
- CVE-2026-34486: Apache Tomcat Missing Encryption of Sensitive Data Vulnerability
- CVE-2026-34197: Apache ActiveMQ Improper Input Validation Vulnerability
- CVE-2024-38475: Apache HTTP Server Improper Escaping of Output Vulnerability
- CVE-2025-24813: Apache Tomcat Path Equivalence Vulnerability