CVSS 3.1
5.9 mediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:HCVE-2021-3629
Medium (5.9). EPSS 1.3% chance of exploitation in the next 30 days. Fixed in io.undertow:undertow-core 2.0.40.Final, 2.2.11.Final.
A flaw was found in Undertow. A potential security issue in flow control handling by the browser over http/2 may potentially cause overhead or a denial of service in the server. The highest threat from this vulnerability is availability. This flaw affects Undertow versions prior to 2.0.40.Final and prior to 2.2.11.Final.
Severity
- EPSS
- 1.3% chance of exploitation in the next 30 days; higher than 70% of CVEs (scores of 2026-10-31)
- CWE
- CWE-400
- Published
- Modified
- Record from
- the NVD, synced
Affected
- netapp:active_iq_unified_manager
- netapp:oncommand_insight
- netapp:oncommand_workflow_automation
- redhat:integration
- redhat:jboss_enterprise_application_platform
- redhat:single_sign-on
- redhat:undertow
- redhat:wildfly_core
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-rf6q-vx79-mjxr | Maven | io.undertow:undertow-core | <2.0.40.Final | 2.0.40.Final |
| GHSA-rf6q-vx79-mjxr | Maven | io.undertow:undertow-core | >=2.1.0 <2.2.11.Final | 2.2.11.Final |