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THREAT OPS › Threat News › [NVD] CVE-2026-5680 (HIGH 7.5) — 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 ex

[NVD] CVE-2026-5680 (HIGH 7.5) — 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 ex

mednvdPublished 2026-08-27

CVE-2026-5680 CVSS: 7.5 HIGH Published: 2026-08-27T17:18:58.397

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 (D

Indicators of compromise

CVE-2026-5680cve

Original source: https://nvd.nist.gov/vuln/detail/CVE-2026-5680