Undertow OutOfMemory when parsing form data encoding with application/x-www-form-urlencoded
A flaw was found in Undertow that can cause remote denial of service attacks. When the server uses the FormEncodedDataDefinition.doParse(StreamSourceChannel) method to parse large form data encoding with application/x-www-form-urlencoded, the method will cause an OutOfMemory issue. This flaw allows unauthorized users to cause a remote denial of service (DoS) attack.
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describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2024-3884US | — | — | ||
A flaw was found in Undertow that can cause remote denial of service attacks. When the server uses the FormEncodedDataDefinition.doParse(StreamSourceChannel) method to parse large… | ||||
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references
External citations — patches, advisories, analysis.
- https://access.redhat.com/errata/RHSA-2025:22773WEB
- https://access.redhat.com/errata/RHSA-2025:22775WEB
- https://access.redhat.com/errata/RHSA-2025:22777WEB
- https://access.redhat.com/errata/RHSA-2025:3990WEB
- https://access.redhat.com/errata/RHSA-2025:3992WEB
- https://access.redhat.com/errata/RHSA-2026:0383WEB
- https://access.redhat.com/errata/RHSA-2026:0384WEB
- https://access.redhat.com/errata/RHSA-2026:0386WEB
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