CVE-2026-5680Suited to automated attack · CISA

Undertow-core: undertow: denial of service via websocket permessage-deflate processing

CVSS score

7.5

EPSS probability

%1.1

Risk score

0.1

Published

1 mo ago

Overview Public Exploits (0)Newsroom Vulnerability Timeline

Patch status has not yet been verified

Resmî kaynaklarda yeterli kanıt bulunamadı. Bu sonuç “yama yok” anlamına gelmez.

Impact on My Inventory

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Vulnerability description

DayBreach CVE AI Research

CVE-2026-5680 has vendor, distribution, patch and security-source records on file. We can compare them and prepare an explanation linked to the evidence.

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.

IMPACT: Affected Products and Software

Affected Products

The following products are affected by CVE-2026-5680 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.

ID	VENDOR	PRODUCT	ACTION
1	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1	View
2	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10	View
3	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10	View
4	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10	View
5	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10	View
6	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10	View
7	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10	View
8	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10	View
9	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10	View
10	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10	View
11	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10	View
12	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10	View
13	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10	View
14	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10	View
15	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10	View
16	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10	View
17	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10	View
18	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10	View
19	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10	View
20	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10	View
21	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10	View
22	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10	View
23	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10	View
24	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10	View
25	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10	View
26	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10	View
27	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10	View
28	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10	View
29	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10	View
30	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10	View
31	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10	View
32	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10	View
33	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10	View
34	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10	View
35	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8	View
36	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8	View
37	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8	View
38	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8	View
39	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8	View
40	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8	View
41	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8	View
42	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8	View
43	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8	View
44	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8	View
45	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8	View
46	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8	View
47	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8	View
48	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8	View
49	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8	View
50	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8	View
51	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8	View
52	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8	View
53	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8	View
54	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8	View
55	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8	View
56	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8	View
57	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8	View
58	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8	View
59	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8	View
60	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8	View
61	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8	View
62	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8	View
63	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8	View
64	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8	View
65	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8	View
66	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8	View
67	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8	View
68	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9	View
69	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9	View
70	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9	View
71	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9	View
72	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9	View
73	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9	View
74	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9	View
75	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9	View
76	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9	View
77	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9	View
78	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9	View
79	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9	View
80	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9	View
81	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9	View
82	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9	View
83	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9	View
84	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9	View
85	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9	View
86	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9	View
87	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9	View
88	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9	View
89	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9	View
90	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9	View
91	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9	View
92	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9	View
93	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9	View
94	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9	View
95	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9	View
96	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9	View
97	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9	View
98	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9	View
99	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9	View
100	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9	View
101	Red Hat	Red Hat build of Apache Camel for Spring Boot 4	View
102	Red Hat	Red Hat build of Apache Camel - HawtIO 4	View
103	Red Hat	Red Hat Data Grid 8	View
104	Red Hat	Red Hat Enterprise Linux 10	View
105	Red Hat	Red Hat Enterprise Linux 8	View
106	Red Hat	Red Hat Enterprise Linux 9	View
107	Red Hat	Red Hat Fuse 7	View
108	Red Hat	Red Hat JBoss Enterprise Application Platform 7	View
109	Red Hat	Red Hat JBoss Enterprise Application Platform Expansion Pack	View
110	Red Hat	Red Hat Process Automation 7	View
111	Red Hat	Red Hat Single Sign-On 7	View

Total affected vendors: 1|Products: 111

RED HAT CSAF/VEX: Product Impact Check

Red Hat has not yet published a CSAF/VEX impact record for this CVE. This does not mean “not affected”.

SCORING: CVSS from Multiple Sources

CVSS Scores

The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.

SCORE	VERSION	SEVERITY	VECTOR	SOURCE
7.5	CVSS V31	HIGH	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	NVD
7.5	CVSS V3_1	HIGH	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	CVE CNA

Patch and Remediation Guide

Solution & Remediation Advisory

Patch status unknown

İncelenen resmî kaynaklarda yama durumu doğrulanamadı. Bu sonuç “yama yok” anlamına gelmez.

Confirm the affected product and version against the source evidence above.

Restrict access to internet-facing services and apply network segmentation.

Until a patch is confirmed, follow the vendor advisory; do not read an unknown status as “no patch”.

Monitor server logs and network endpoints for signs of anomalous execution.

Public exploit and active exploitation status

Verified exploit intelligence

No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.

Weakness Classification and Attack Patterns (CWE & CAPEC)

CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-5680 is associated with the following CWEs:

CWE-770: Allocation of Resources Without Limits or Throttling

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-5680 weaknesses.

CAPEC-66: SQL Injection CAPEC-126: Path Traversal CAPEC-28: OS Command Injection

Attack Vector and Accessibility

ExposureAğ üzerinden

PermissionsGerekmiyor

UserGerekmiyor

Official Sources and Advisories

RHSA-2026:70228vendor-advisory RHSA-2026:70229vendor-advisory RHSA-2026:70230vendor-advisory RHSA-2026:70277vendor-advisory https://access.redhat.com/security/cve/CVE-2026-5680vendor-advisory RHBZ#2455350vendor-advisory

CVSS Vector Radar Chart

7.5 / 10

Vulnerability Scoring Details

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone required

User InteractionNone required

Confidentiality (Gizlilik)Low

Integrity (Bütünlük)None

Availability (Erişilebilirlik)High

Yama durumu bilinmiyor

İncelenen resmî kaynaklarda yama durumu doğrulanamadı. Bu sonuç “yama yok” anlamına gelmez.

Follow the vendor

Red Hat

Weakness Type (CWE & CAPEC)

CWE-770

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