CVSS 3.1
7.5 highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HCVE-2021-3690
High (7.5) in redhat. EPSS 1.8% chance of exploitation in the next 30 days. Fixed in io.undertow:undertow-core 2.0.40, 2.2.10.
A flaw was found in Undertow. A buffer leak on the incoming WebSocket PONG message may lead to memory exhaustion. This flaw allows an attacker to cause a denial of service. The highest threat from this vulnerability is availability.
Severity
- EPSS
- 1.8% chance of exploitation in the next 30 days; higher than 78% of CVEs (scores of 2026-10-31)
- CWEs
- CWE-401, CWE-400
- Published
- Modified
- Record from
- the NVD, synced
Affected
- redhat:fuse
- redhat:integration_camel_k
- redhat:integration_camel_quarkus
- redhat:jboss_enterprise_application_platform
- redhat:openshift_application_runtimes
- redhat:single_sign-on
- redhat:undertow
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-fj7c-vg2v-ccrm | Maven | io.undertow:undertow-core | <2.0.40 | 2.0.40 |
| GHSA-fj7c-vg2v-ccrm | Maven | io.undertow:undertow-core | >=2.2.0 <2.2.10 | 2.2.10 |