CVE-2021-3629: Undertow Uncontrolled Resource Consumption

May 25, 2022 (updated June 12, 2025)

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.

References

bugzilla.redhat.com/show_bug.cgi?id=1977362
github.com/advisories/GHSA-rf6q-vx79-mjxr
github.com/undertow-io/undertow
nvd.nist.gov/vuln/detail/CVE-2021-3629
security.netapp.com/advisory/ntap-20220729-0008

Code Behaviors & Features

Detect and mitigate CVE-2021-3629 with GitLab Dependency Scanning

Secure your software supply chain by verifying that all open source dependencies used in your projects contain no disclosed vulnerabilities. Dependency Scanning using SBOM also detects vulnerabilities from proprietary advisories that this site does not include. Learn more about Dependency Scanning using SBOM →