PT-2026-82541

CVE-2026-5680

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Published

2026-08-27

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Updated

2026-10-20

Description by

CVSS 3.1
7.5
High
MetricsAV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Name of the Vulnerable Software and Affected Versions Undertow (affected versions not specified)
Description A flaw exists where a remote attacker can cause a Denial of Service (DoS) by sending specially crafted WebSocket messages with permessage-deflate negotiated. This leads to excessive memory consumption because the largerBuffer() method within the PerMessageDeflateFunction uses exponential doubling.
Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.
Impacts
Vendors
Affected products
Weakness enumeration
CWE-770: Allocation of Resources Without Limits or Throttling
Related identifiers
CVE-2026-5680
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