CVEvulnerability
CVE-2026-5680
7.5 HIGH
Official page ↗
- Status
- Awaiting Analysis
- Published
- 2026-08-27
- Last modified
- 2026-10-20
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weaknesses
- CWE-770
Description
A flaw was found in Undertow. A remote attacker could exploit this vulnerability by sending specially crafted WebSocket messages with permessage-deflate negotiated. This could lead to excessive memory consumption due to the PerMessageDeflateFunction.largerBuffer() method using exponential doubling, resulting in a Denial of Service (DoS) for the affected application.
Related
Weakness · CWE (1)
- CWE-770 Allocation of Resources Without Limits or Throttling weakness
References
- https://access.redhat.com/errata/RHSA-2026:70228 access.redhat.com
- https://access.redhat.com/errata/RHSA-2026:70229 access.redhat.com
- https://access.redhat.com/errata/RHSA-2026:70230 access.redhat.com
- https://access.redhat.com/errata/RHSA-2026:70277 access.redhat.com
- https://access.redhat.com/security/cve/CVE-2026-5680 access.redhat.com
- https://bugzilla.redhat.com/show_bug.cgi?id=2455350 bugzilla.redhat.com