CVE-2026-110737 (GCVE-0-2026-110737)
Vulnerability from cvelistv5 – Published: 2026-10-27 10:26 – Updated: 2026-10-27 13:03
VLAI
EPSS
VEX
Title
Push Endpoint Returns Permissive CORS Headers
Summary
The push endpoint of a Vaadin application that uses server push reflects the request Origin into the Access-Control-Allow-Origin response header and allows credentials, because Flow configures Atmosphere with DROP_ACCESS_CONTROL_ALLOW_ORIGIN_HEADER set to false and its CorsInterceptor then echoes whatever Origin the request carries. A page on any origin can therefore make a cross origin request to that endpoint with the user's cookies and read the response, although reading anything useful also requires the push identifier of that session. Applications that do not use @Push are not affected, and neither is the WebSocket transport. The behaviour was introduced in January 2015 and is present in every Flow release and in Vaadin Framework from 7.1.0, which is when push was added.
Users of affected versions should apply the following mitigation or upgrade. Releases that have fixed this issue include:
Product version
Vaadin 14.14.0 - 14.14.7
Vaadin 23.6.0 - 23.6.16
Vaadin 24.4.0 - 24.4.25
Vaadin 24.5.0 - 24.5.15
Vaadin 24.6.0 - 24.6.13
Vaadin 24.7.0 - 24.7.16
Vaadin 24.8.0 - 24.8.17
Vaadin 24.9.0 - 24.9.23
Vaadin 24.10.0 - 24.10.11
Vaadin 25.0.0 - 25.0.13
Vaadin 25.1.0 - 25.1.13
Vaadin 25.2.0 - 25.2.10
Vaadin 25.3.0 - 25.3.2
Vaadin Framework 7.1.0 - 7.7.54
Vaadin Framework 8.0.0 - 8.32.1
Mitigation
Upgrade to 14.14.8
Upgrade to 23.6.17
Upgrade to 24.4.26
Upgrade to 24.7.17
Upgrade to 24.7.17
Upgrade to 24.7.17
Upgrade to 24.9.24
Upgrade to 24.9.24
Upgrade to 24.10.12
Upgrade to 25.2.11
Upgrade to 25.2.11
Upgrade to 25.2.11
Upgrade to 25.3.3
Upgrade to 7.7.55
Upgrade to 8.32.2
Please note that Vaadin versions 10-13 and 15-22 are no longer supported and you should update either to the latest 14, 23, 24, 25 version.
Artifacts under com.vaadin
Maven coordinates / Vulnerable versions / Fixed version
vaadin / 14.14.0 - 14.14.7 / >=14.14.8
vaadin / 23.6.0 - 23.6.16 / >=23.6.17
vaadin / 24.4.0 - 24.4.25 / >=24.4.26
vaadin / 24.5.0 - 24.5.15 / >=24.7.17
vaadin / 24.6.0 - 24.6.13 / >=24.7.17
vaadin / 24.7.0 - 24.7.16 / >=24.7.17
vaadin / 24.8.0 - 24.8.17 / >=24.9.24
vaadin / 24.9.0 - 24.9.23 / >=24.9.24
vaadin / 24.10.0 - 24.10.11 / >=24.10.12
vaadin / 25.0.0 - 25.0.13 / >=25.2.11
vaadin / 25.1.0 - 25.1.13 / >=25.2.11
vaadin / 25.2.0 - 25.2.10 / >=25.2.11
vaadin / 25.3.0 - 25.3.2 / >=25.3.3
vaadin-core / 14.14.0 - 14.14.7 / >=14.14.8
vaadin-core / 23.6.0 - 23.6.16 / >=23.6.17
vaadin-core / 24.4.0 - 24.4.25 / >=24.4.26
vaadin-core / 24.5.0 - 24.5.15 / >=24.7.17
vaadin-core / 24.6.0 - 24.6.13 / >=24.7.17
vaadin-core / 24.7.0 - 24.7.16 / >=24.7.17
vaadin-core / 24.8.0 - 24.8.17 / >=24.9.24
vaadin-core / 24.9.0 - 24.9.23 / >=24.9.24
vaadin-core / 24.10.0 - 24.10.11 / >=24.10.12
vaadin-core / 25.0.0 - 25.0.13 / >=25.2.11
vaadin-core / 25.1.0 - 25.1.13 / >=25.2.11
vaadin-core / 25.2.0 - 25.2.10 / >=25.2.11
vaadin-core / 25.3.0 - 25.3.2 / >=25.3.3
flow-server / 2.13.0 - 2.13.7 / >=2.13.8
flow-server / 23.6.0 - 23.6.15 / >=23.6.16
flow-server / 24.4.0 - 24.4.18 / >=24.4.19
flow-server / 24.5.0 - 24.5.17 / >=24.7.17
flow-server / 24.6.0 - 24.6.14 / >=24.7.17
flow-server / 24.7.0 - 24.7.15 / >=24.7.16
flow-server / 24.8.0 - 24.8.16 / >=24.9.24
flow-server / 24.9.0 - 24.9.28 / >=24.9.29
flow-server / 24.10.0 - 24.10.14 / >=24.10.15
flow-server / 25.0.0 - 25.0.15 / >=25.2.11
flow-server / 25.1.0 - 25.1.18 / >=25.1.19
flow-server / 25.2.0 - 25.2.12 / >=25.2.13
flow-server / 25.3.0 - 25.3.3 / >=25.3.4
vaadin-server / 7.1.0 - 7.7.54 / >=7.7.55
vaadin-server / 8.0.0 - 8.32.1 / >=8.32.2
vaadin-server-mpr-jakarta / 7.7.36 - 7.7.54 / >=7.7.55
vaadin-server-mpr-jakarta / 8.18.0 - 8.32.1 / >=8.32.2
Severity
CWE
Assigner
References
Impacted products
4 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| vaadin | vaadin |
Affected:
14.14.0 , < 14.14.8
(maven)
Affected: 23.6.0 , < 23.6.17 (maven) Affected: 24.4.0 , < 24.4.26 (maven) Affected: 24.5.0 , ≤ 24.5.15 (maven) Affected: 24.6.0 , ≤ 24.6.13 (maven) Affected: 24.7.0 , < 24.7.17 (maven) Affected: 24.8.0 , ≤ 24.8.17 (maven) Affected: 24.9.0 , < 24.9.24 (maven) Affected: 24.10.0 , < 24.10.12 (maven) Affected: 25.0.0 , ≤ 25.0.13 (maven) Affected: 25.1.0 , ≤ 25.1.13 (maven) Affected: 25.2.0 , < 25.2.11 (maven) Affected: 25.3.0 , < 25.3.3 (maven) |
guessed | |
| vaadin | flow |
Affected:
2.13.0 , < 2.13.8
(maven)
Affected: 23.6.0 , < 23.6.16 (maven) Affected: 24.4.0 , < 24.4.19 (maven) Affected: 24.5.0 , ≤ 24.5.17 (maven) Affected: 24.6.0 , ≤ 24.6.14 (maven) Affected: 24.7.0 , < 24.7.16 (maven) Affected: 24.8.0 , ≤ 24.8.16 (maven) Affected: 24.9.0 , < 24.9.29 (maven) Affected: 24.10.0 , < 24.10.15 (maven) Affected: 25.0.0 , ≤ 25.0.15 (maven) Affected: 25.1.0 , < 25.1.19 (maven) Affected: 25.2.0 , < 25.2.13 (maven) Affected: 25.3.0 , < 25.3.4 (maven) |
guessed | |
| vaadin | framework |
Affected:
7.1.0 , < 7.7.55
(maven)
Affected: 8.0.0 , < 8.32.2 (maven) |
guessed | |
| vaadin | framework |
Affected:
7.7.36 , < 7.7.55
(maven)
Affected: 8.18.0 , < 8.32.2 (maven) |
guessed |
{
"containers": {
"cna": {
"affected": [
{
"collectionURL": "https://repo.maven.apache.org/maven2",
"defaultStatus": "unaffected",
"packageName": "com.vaadin:vaadin",
"product": "vaadin",
"repo": "https://github.com/vaadin/platform",
"vendor": "vaadin",
"versions": [
{
"lessThan": "14.14.8",
"status": "affected",
"version": "14.14.0",
"versionType": "maven"
},
{
"lessThan": "23.6.17",
"status": "affected",
"version": "23.6.0",
"versionType": "maven"
},
{
"lessThan": "24.4.26",
"status": "affected",
"version": "24.4.0",
"versionType": "maven"
},
{
"lessThanOrEqual": "24.5.15",
"status": "affected",
"version": "24.5.0",
"versionType": "maven"
},
{
"lessThanOrEqual": "24.6.13",
"status": "affected",
"version": "24.6.0",
"versionType": "maven"
},
{
"lessThan": "24.7.17",
"status": "affected",
"version": "24.7.0",
"versionType": "maven"
},
{
"lessThanOrEqual": "24.8.17",
"status": "affected",
"version": "24.8.0",
"versionType": "maven"
},
{
"lessThan": "24.9.24",
"status": "affected",
"version": "24.9.0",
"versionType": "maven"
},
{
"lessThan": "24.10.12",
"status": "affected",
"version": "24.10.0",
"versionType": "maven"
},
{
"lessThanOrEqual": "25.0.13",
"status": "affected",
"version": "25.0.0",
"versionType": "maven"
},
{
"lessThanOrEqual": "25.1.13",
"status": "affected",
"version": "25.1.0",
"versionType": "maven"
},
{
"lessThan": "25.2.11",
"status": "affected",
"version": "25.2.0",
"versionType": "maven"
},
{
"lessThan": "25.3.3",
"status": "affected",
"version": "25.3.0",
"versionType": "maven"
}
]
},
{
"collectionURL": "https://repo.maven.apache.org/maven2",
"defaultStatus": "unaffected",
"packageName": "com.vaadin:vaadin-core",
"product": "vaadin",
"repo": "https://github.com/vaadin/platform",
"vendor": "vaadin",
"versions": [
{
"lessThan": "14.14.8",
"status": "affected",
"version": "14.14.0",
"versionType": "maven"
},
{
"lessThan": "23.6.17",
"status": "affected",
"version": "23.6.0",
"versionType": "maven"
},
{
"lessThan": "24.4.26",
"status": "affected",
"version": "24.4.0",
"versionType": "maven"
},
{
"lessThanOrEqual": "24.5.15",
"status": "affected",
"version": "24.5.0",
"versionType": "maven"
},
{
"lessThanOrEqual": "24.6.13",
"status": "affected",
"version": "24.6.0",
"versionType": "maven"
},
{
"lessThan": "24.7.17",
"status": "affected",
"version": "24.7.0",
"versionType": "maven"
},
{
"lessThanOrEqual": "24.8.17",
"status": "affected",
"version": "24.8.0",
"versionType": "maven"
},
{
"lessThan": "24.9.24",
"status": "affected",
"version": "24.9.0",
"versionType": "maven"
},
{
"lessThan": "24.10.12",
"status": "affected",
"version": "24.10.0",
"versionType": "maven"
},
{
"lessThanOrEqual": "25.0.13",
"status": "affected",
"version": "25.0.0",
"versionType": "maven"
},
{
"lessThanOrEqual": "25.1.13",
"status": "affected",
"version": "25.1.0",
"versionType": "maven"
},
{
"lessThan": "25.2.11",
"status": "affected",
"version": "25.2.0",
"versionType": "maven"
},
{
"lessThan": "25.3.3",
"status": "affected",
"version": "25.3.0",
"versionType": "maven"
}
]
},
{
"collectionURL": "https://repo.maven.apache.org/maven2",
"defaultStatus": "unaffected",
"packageName": "com.vaadin:flow-server",
"product": "flow",
"repo": "https://github.com/vaadin/flow",
"vendor": "vaadin",
"versions": [
{
"lessThan": "2.13.8",
"status": "affected",
"version": "2.13.0",
"versionType": "maven"
},
{
"lessThan": "23.6.16",
"status": "affected",
"version": "23.6.0",
"versionType": "maven"
},
{
"lessThan": "24.4.19",
"status": "affected",
"version": "24.4.0",
"versionType": "maven"
},
{
"lessThanOrEqual": "24.5.17",
"status": "affected",
"version": "24.5.0",
"versionType": "maven"
},
{
"lessThanOrEqual": "24.6.14",
"status": "affected",
"version": "24.6.0",
"versionType": "maven"
},
{
"lessThan": "24.7.16",
"status": "affected",
"version": "24.7.0",
"versionType": "maven"
},
{
"lessThanOrEqual": "24.8.16",
"status": "affected",
"version": "24.8.0",
"versionType": "maven"
},
{
"lessThan": "24.9.29",
"status": "affected",
"version": "24.9.0",
"versionType": "maven"
},
{
"lessThan": "24.10.15",
"status": "affected",
"version": "24.10.0",
"versionType": "maven"
},
{
"lessThanOrEqual": "25.0.15",
"status": "affected",
"version": "25.0.0",
"versionType": "maven"
},
{
"lessThan": "25.1.19",
"status": "affected",
"version": "25.1.0",
"versionType": "maven"
},
{
"lessThan": "25.2.13",
"status": "affected",
"version": "25.2.0",
"versionType": "maven"
},
{
"lessThan": "25.3.4",
"status": "affected",
"version": "25.3.0",
"versionType": "maven"
}
]
},
{
"collectionURL": "https://repo.maven.apache.org/maven2",
"defaultStatus": "unaffected",
"packageName": "com.vaadin:vaadin-server",
"product": "framework",
"repo": "https://github.com/vaadin/framework",
"vendor": "vaadin",
"versions": [
{
"lessThan": "7.7.55",
"status": "affected",
"version": "7.1.0",
"versionType": "maven"
},
{
"lessThan": "8.32.2",
"status": "affected",
"version": "8.0.0",
"versionType": "maven"
}
]
},
{
"collectionURL": "https://repo.maven.apache.org/maven2",
"defaultStatus": "unaffected",
"packageName": "com.vaadin:vaadin-server-mpr-jakarta",
"product": "framework",
"repo": "https://github.com/vaadin/framework",
"vendor": "vaadin",
"versions": [
{
"lessThan": "7.7.55",
"status": "affected",
"version": "7.7.36",
"versionType": "maven"
},
{
"lessThan": "8.32.2",
"status": "affected",
"version": "8.18.0",
"versionType": "maven"
}
]
}
],
"descriptions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "\u003cspan style=\"background-color: rgba(232, 232, 232, 0.04);\"\u003eThe push endpoint of a Vaadin application that uses server push reflects the request Origin into the Access-Control-Allow-Origin response header and allows credentials, because Flow configures Atmosphere with DROP_ACCESS_CONTROL_ALLOW_ORIGIN_HEADER set to false and its CorsInterceptor then echoes whatever Origin the request carries. A page on any origin can therefore make a cross origin request to that endpoint with the user\u0027s cookies and read the response, although reading anything useful also requires the push identifier of that session. Applications that do not use @Push are not affected, and neither is the WebSocket transport. The behaviour was introduced in January 2015 and is present in every Flow release and in Vaadin Framework from 7.1.0, which is when push was added.\u003cbr\u003e\u003cbr\u003e\u003cbr\u003eUsers of affected versions should apply the following mitigation or upgrade. Releases that have fixed this issue include:\u003cbr\u003e\u003cbr\u003eProduct version\u003cbr\u003eVaadin 14.14.0 - 14.14.7\u003cbr\u003eVaadin 23.6.0 - 23.6.16\u003cbr\u003eVaadin 24.4.0 - 24.4.25\u003cbr\u003eVaadin 24.5.0 - 24.5.15\u003cbr\u003eVaadin 24.6.0 - 24.6.13\u003cbr\u003eVaadin 24.7.0 - 24.7.16\u003cbr\u003eVaadin 24.8.0 - 24.8.17\u003cbr\u003eVaadin 24.9.0 - 24.9.23\u003cbr\u003eVaadin 24.10.0 - 24.10.11\u003cbr\u003eVaadin 25.0.0 - 25.0.13\u003cbr\u003eVaadin 25.1.0 - 25.1.13\u003cbr\u003eVaadin 25.2.0 - 25.2.10\u003cbr\u003eVaadin 25.3.0 - 25.3.2\u003cbr\u003eVaadin Framework 7.1.0 - 7.7.54\u003cbr\u003eVaadin Framework 8.0.0 - 8.32.1\u003cbr\u003e\u003cbr\u003eMitigation\u003cbr\u003eUpgrade to 14.14.8\u003cbr\u003eUpgrade to 23.6.17\u003cbr\u003eUpgrade to 24.4.26\u003cbr\u003eUpgrade to 24.7.17\u003cbr\u003eUpgrade to 24.7.17\u003cbr\u003eUpgrade to 24.7.17\u003cbr\u003eUpgrade to 24.9.24\u003cbr\u003eUpgrade to 24.9.24\u003cbr\u003eUpgrade to 24.10.12\u003cbr\u003eUpgrade to 25.2.11\u003cbr\u003eUpgrade to 25.2.11\u003cbr\u003eUpgrade to 25.2.11\u003cbr\u003eUpgrade to 25.3.3\u003cbr\u003eUpgrade to 7.7.55\u003cbr\u003eUpgrade to 8.32.2\u003cbr\u003e\u003cbr\u003ePlease note that Vaadin versions 10-13 and 15-22 are no longer supported and you should update either to the latest 14, 23, 24, 25 version.\u003cbr\u003e\u003cbr\u003eArtifacts\u003ctable\u003e\u003ctbody\u003e\u003ctr\u003e\u003ctd\u003eMaven coordinates\u003c/td\u003e\u003ctd\u003eVulnerable versions\u003c/td\u003e\u003ctd\u003eFixed version\u003c/td\u003e\u003c/tr\u003e\u003ctr\u003e\u003ctd\u003ecom.vaadin:vaadin\u003cbr\u003e\u003c/td\u003e\u003ctd\u003e14.14.0 - 14.14.7\u003cbr\u003e\u003c/td\u003e\u003ctd\u003e\u0026ge;14.14.8\u003cbr\u003e\u003c/td\u003e\u003c/tr\u003e\u003ctr\u003e\u003ctd\u003ecom.vaadin:vaadin\u003cbr\u003e\u003c/td\u003e\u003ctd\u003e23.6.0 - 23.6.16\u003cbr\u003e\u003c/td\u003e\u003ctd\u003e\u0026ge;23.6.17\u003cbr\u003e\u003c/td\u003e\u003c/tr\u003e\u003ctr\u003e\u003ctd\u003ecom.vaadin:vaadin\u003cbr\u003e\u003c/td\u003e\u003ctd\u003e24.4.0 - 24.4.25\u003cbr\u003e\u003c/td\u003e\u003ctd\u003e\u0026ge;24.4.26\u003cbr\u003e\u003c/td\u003e\u003c/tr\u003e\u003ctr\u003e\u003ctd\u003ecom.vaadin:vaadin\u003cbr\u003e\u003c/td\u003e\u003ctd\u003e24.5.0 - 24.5.15\u003cbr\u003e\u003c/td\u003e\u003ctd\u003e\u0026ge;24.7.17\u003cbr\u003e\u003c/td\u003e\u003c/tr\u003e\u003ctr\u003e\u003ctd\u003ecom.vaadin:vaadin\u003cbr\u003e\u003c/td\u003e\u003ctd\u003e24.6.0 - 24.6.13\u003cbr\u003e\u003c/td\u003e\u003ctd\u003e\u0026ge;24.7.17\u003cbr\u003e\u003c/td\u003e\u003c/tr\u003e\u003ctr\u003e\u003ctd\u003ecom.vaadin:vaadin\u003cbr\u003e\u003c/td\u003e\u003ctd\u003e24.7.0 - 24.7.16\u003cbr\u003e\u003c/td\u003e\u003ctd\u003e\u0026ge;24.7.17\u003cbr\u003e\u003c/td\u003e\u003c/tr\u003e\u003ctr\u003e\u003ctd\u003ecom.vaadin:vaadin\u003cbr\u003e\u003c/td\u003e\u003ctd\u003e24.8.0 - 24.8.17\u003cbr\u003e\u003c/td\u003e\u003ctd\u003e\u0026ge;24.9.24\u003cbr\u003e\u003c/td\u003e\u003c/tr\u003e\u003ctr\u003e\u003ctd\u003ecom.vaadin:vaadin\u003cbr\u003e\u003c/td\u003e\u003ctd\u003e24.9.0 - 24.9.23\u003cbr\u003e\u003c/td\u003e\u003ctd\u003e\u0026ge;24.9.24\u003cbr\u003e\u003c/td\u003e\u003c/tr\u003e\u003ctr\u003e\u003ctd\u003ecom.vaadin:vaadin\u003cbr\u003e\u003c/td\u003e\u003ctd\u003e24.10.0 - 24.10.11\u003cbr\u003e\u003c/td\u003e\u003ctd\u003e\u0026ge;24.10.12\u003cbr\u003e\u003c/td\u003e\u003c/tr\u003e\u003ctr\u003e\u003ctd\u003ecom.vaadin:vaadin\u003cbr\u003e\u003c/td\u003e\u003ctd\u003e25.0.0 - 25.0.13\u003cbr\u003e\u003c/td\u003e\u003ctd\u003e\u0026ge;25.2.11\u003cbr\u003e\u003c/td\u003e\u003c/tr\u003e\u003ctr\u003e\u003ctd\u003ecom.vaadin:vaadin\u003cbr\u003e\u003c/td\u003e\u003ctd\u003e25.1.0 - 25.1.13\u003cbr\u003e\u003c/td\u003e\u003ctd\u003e\u0026ge;25.2.11\u003cbr\u003e\u003c/td\u003e\u003c/tr\u003e\u003ctr\u003e\u003ctd\u003ecom.vaadin:vaadin\u003cbr\u003e\u003c/td\u003e\u003ctd\u003e25.2.0 - 25.2.10\u003cbr\u003e\u003c/td\u003e\u003ctd\u003e\u0026ge;25.2.11\u003cbr\u003e\u003c/td\u003e\u003c/tr\u003e\u003ctr\u003e\u003ctd\u003ecom.vaadin:vaadin\u003cbr\u003e\u003c/td\u003e\u003ctd\u003e25.3.0 - 25.3.2\u003cbr\u003e\u003c/td\u003e\u003ctd\u003e\u0026ge;25.3.3\u003cbr\u003e\u003c/td\u003e\u003c/tr\u003e\u003ctr\u003e\u003ctd\u003ecom.vaadin:vaadin-core\u003cbr\u003e\u003c/td\u003e\u003ctd\u003e14.14.0 - 14.14.7\u003cbr\u003e\u003c/td\u003e\u003ctd\u003e\u0026ge;14.14.8\u003cbr\u003e\u003c/td\u003e\u003c/tr\u003e\u003ctr\u003e\u003ctd\u003ecom.vaadin:vaadin-core\u003cbr\u003e\u003c/td\u003e\u003ctd\u003e23.6.0 - 23.6.16\u003cbr\u003e\u003c/td\u003e\u003ctd\u003e\u0026ge;23.6.17\u003cbr\u003e\u003c/td\u003e\u003c/tr\u003e\u003ctr\u003e\u003ctd\u003ecom.vaadin:vaadin-core\u003cbr\u003e\u003c/td\u003e\u003ctd\u003e24.4.0 - 24.4.25\u003cbr\u003e\u003c/td\u003e\u003ctd\u003e\u0026ge;24.4.26\u003cbr\u003e\u003c/td\u003e\u003c/tr\u003e\u003ctr\u003e\u003ctd\u003ecom.vaadin:vaadin-core\u003cbr\u003e\u003c/td\u003e\u003ctd\u003e24.5.0 - 24.5.15\u003cbr\u003e\u003c/td\u003e\u003ctd\u003e\u0026ge;24.7.17\u003cbr\u003e\u003c/td\u003e\u003c/tr\u003e\u003ctr\u003e\u003ctd\u003ecom.vaadin:vaadin-core\u003cbr\u003e\u003c/td\u003e\u003ctd\u003e24.6.0 - 24.6.13\u003cbr\u003e\u003c/td\u003e\u003ctd\u003e\u0026ge;24.7.17\u003cbr\u003e\u003c/td\u003e\u003c/tr\u003e\u003ctr\u003e\u003ctd\u003ecom.vaadin:vaadin-core\u003cbr\u003e\u003c/td\u003e\u003ctd\u003e24.7.0 - 24.7.16\u003cbr\u003e\u003c/td\u003e\u003ctd\u003e\u0026ge;24.7.17\u003cbr\u003e\u003c/td\u003e\u003c/tr\u003e\u003ctr\u003e\u003ctd\u003ecom.vaadin:vaadin-core\u003cbr\u003e\u003c/td\u003e\u003ctd\u003e24.8.0 - 24.8.17\u003cbr\u003e\u003c/td\u003e\u003ctd\u003e\u0026ge;24.9.24\u003cbr\u003e\u003c/td\u003e\u003c/tr\u003e\u003ctr\u003e\u003ctd\u003ecom.vaadin:vaadin-core\u003cbr\u003e\u003c/td\u003e\u003ctd\u003e24.9.0 - 24.9.23\u003cbr\u003e\u003c/td\u003e\u003ctd\u003e\u0026ge;24.9.24\u003cbr\u003e\u003c/td\u003e\u003c/tr\u003e\u003ctr\u003e\u003ctd\u003ecom.vaadin:vaadin-core\u003cbr\u003e\u003c/td\u003e\u003ctd\u003e24.10.0 - 24.10.11\u003cbr\u003e\u003c/td\u003e\u003ctd\u003e\u0026ge;24.10.12\u003cbr\u003e\u003c/td\u003e\u003c/tr\u003e\u003ctr\u003e\u003ctd\u003ecom.vaadin:vaadin-core\u003cbr\u003e\u003c/td\u003e\u003ctd\u003e25.0.0 - 25.0.13\u003cbr\u003e\u003c/td\u003e\u003ctd\u003e\u0026ge;25.2.11\u003cbr\u003e\u003c/td\u003e\u003c/tr\u003e\u003ctr\u003e\u003ctd\u003ecom.vaadin:vaadin-core\u003cbr\u003e\u003c/td\u003e\u003ctd\u003e25.1.0 - 25.1.13\u003cbr\u003e\u003c/td\u003e\u003ctd\u003e\u0026ge;25.2.11\u003cbr\u003e\u003c/td\u003e\u003c/tr\u003e\u003ctr\u003e\u003ctd\u003ecom.vaadin:vaadin-core\u003cbr\u003e\u003c/td\u003e\u003ctd\u003e25.2.0 - 25.2.10\u003cbr\u003e\u003c/td\u003e\u003ctd\u003e\u0026ge;25.2.11\u003cbr\u003e\u003c/td\u003e\u003c/tr\u003e\u003ctr\u003e\u003ctd\u003ecom.vaadin:vaadin-core\u003cbr\u003e\u003c/td\u003e\u003ctd\u003e25.3.0 - 25.3.2\u003cbr\u003e\u003c/td\u003e\u003ctd\u003e\u0026ge;25.3.3\u003cbr\u003e\u003c/td\u003e\u003c/tr\u003e\u003ctr\u003e\u003ctd\u003ecom.vaadin:flow-server\u003cbr\u003e\u003c/td\u003e\u003ctd\u003e2.13.0 - 2.13.7\u003cbr\u003e\u003c/td\u003e\u003ctd\u003e\u0026ge;2.13.8\u003cbr\u003e\u003c/td\u003e\u003c/tr\u003e\u003ctr\u003e\u003ctd\u003ecom.vaadin:flow-server\u003cbr\u003e\u003c/td\u003e\u003ctd\u003e23.6.0 - 23.6.15\u003cbr\u003e\u003c/td\u003e\u003ctd\u003e\u0026ge;23.6.16\u003cbr\u003e\u003c/td\u003e\u003c/tr\u003e\u003ctr\u003e\u003ctd\u003ecom.vaadin:flow-server\u003cbr\u003e\u003c/td\u003e\u003ctd\u003e24.4.0 - 24.4.18\u003cbr\u003e\u003c/td\u003e\u003ctd\u003e\u0026ge;24.4.19\u003cbr\u003e\u003c/td\u003e\u003c/tr\u003e\u003ctr\u003e\u003ctd\u003ecom.vaadin:flow-server\u003cbr\u003e\u003c/td\u003e\u003ctd\u003e24.5.0 - 24.5.17\u003cbr\u003e\u003c/td\u003e\u003ctd\u003e\u0026ge;24.7.17\u003cbr\u003e\u003c/td\u003e\u003c/tr\u003e\u003ctr\u003e\u003ctd\u003ecom.vaadin:flow-server\u003cbr\u003e\u003c/td\u003e\u003ctd\u003e24.6.0 - 24.6.14\u003cbr\u003e\u003c/td\u003e\u003ctd\u003e\u0026ge;24.7.17\u003cbr\u003e\u003c/td\u003e\u003c/tr\u003e\u003ctr\u003e\u003ctd\u003ecom.vaadin:flow-server\u003cbr\u003e\u003c/td\u003e\u003ctd\u003e24.7.0 - 24.7.15\u003cbr\u003e\u003c/td\u003e\u003ctd\u003e\u0026ge;24.7.16\u003cbr\u003e\u003c/td\u003e\u003c/tr\u003e\u003ctr\u003e\u003ctd\u003ecom.vaadin:flow-server\u003cbr\u003e\u003c/td\u003e\u003ctd\u003e24.8.0 - 24.8.16\u003cbr\u003e\u003c/td\u003e\u003ctd\u003e\u0026ge;24.9.24\u003cbr\u003e\u003c/td\u003e\u003c/tr\u003e\u003ctr\u003e\u003ctd\u003ecom.vaadin:flow-server\u003cbr\u003e\u003c/td\u003e\u003ctd\u003e24.9.0 - 24.9.28\u003cbr\u003e\u003c/td\u003e\u003ctd\u003e\u0026ge;24.9.29\u003cbr\u003e\u003c/td\u003e\u003c/tr\u003e\u003ctr\u003e\u003ctd\u003ecom.vaadin:flow-server\u003cbr\u003e\u003c/td\u003e\u003ctd\u003e24.10.0 - 24.10.14\u003cbr\u003e\u003c/td\u003e\u003ctd\u003e\u0026ge;24.10.15\u003cbr\u003e\u003c/td\u003e\u003c/tr\u003e\u003ctr\u003e\u003ctd\u003ecom.vaadin:flow-server\u003cbr\u003e\u003c/td\u003e\u003ctd\u003e25.0.0 - 25.0.15\u003cbr\u003e\u003c/td\u003e\u003ctd\u003e\u0026ge;25.2.11\u003cbr\u003e\u003c/td\u003e\u003c/tr\u003e\u003ctr\u003e\u003ctd\u003ecom.vaadin:flow-server\u003cbr\u003e\u003c/td\u003e\u003ctd\u003e25.1.0 - 25.1.18\u003cbr\u003e\u003c/td\u003e\u003ctd\u003e\u0026ge;25.1.19\u003cbr\u003e\u003c/td\u003e\u003c/tr\u003e\u003ctr\u003e\u003ctd\u003ecom.vaadin:flow-server\u003cbr\u003e\u003c/td\u003e\u003ctd\u003e25.2.0 - 25.2.12\u003cbr\u003e\u003c/td\u003e\u003ctd\u003e\u0026ge;25.2.13\u003cbr\u003e\u003c/td\u003e\u003c/tr\u003e\u003ctr\u003e\u003ctd\u003ecom.vaadin:flow-server\u003cbr\u003e\u003c/td\u003e\u003ctd\u003e25.3.0 - 25.3.3\u003cbr\u003e\u003c/td\u003e\u003ctd\u003e\u0026ge;25.3.4\u003cbr\u003e\u003c/td\u003e\u003c/tr\u003e\u003ctr\u003e\u003ctd\u003ecom.vaadin:vaadin-server\u003cbr\u003e\u003c/td\u003e\u003ctd\u003e7.1.0 - 7.7.54\u003cbr\u003e\u003c/td\u003e\u003ctd\u003e\u0026ge;7.7.55\u003cbr\u003e\u003c/td\u003e\u003c/tr\u003e\u003ctr\u003e\u003ctd\u003ecom.vaadin:vaadin-server\u003cbr\u003e\u003c/td\u003e\u003ctd\u003e8.0.0 - 8.32.1\u003cbr\u003e\u003c/td\u003e\u003ctd\u003e\u0026ge;8.32.2\u003cbr\u003e\u003c/td\u003e\u003c/tr\u003e\u003ctr\u003e\u003ctd\u003ecom.vaadin:vaadin-server-mpr-jakarta\u003cbr\u003e\u003c/td\u003e\u003ctd\u003e7.7.36 - 7.7.54\u003cbr\u003e\u003c/td\u003e\u003ctd\u003e\u0026ge;7.7.55\u003cbr\u003e\u003c/td\u003e\u003c/tr\u003e\u003ctr\u003e\u003ctd\u003ecom.vaadin:vaadin-server-mpr-jakarta\u003cbr\u003e\u003c/td\u003e\u003ctd\u003e8.18.0 - 8.32.1\u003cbr\u003e\u003c/td\u003e\u003ctd\u003e\u0026ge;8.32.2\u003cbr\u003e\u003c/td\u003e\u003c/tr\u003e\u003c/tbody\u003e\u003c/table\u003e\u003c/span\u003e"
}
],
"value": "The push endpoint of a Vaadin application that uses server push reflects the request Origin into the Access-Control-Allow-Origin response header and allows credentials, because Flow configures Atmosphere with DROP_ACCESS_CONTROL_ALLOW_ORIGIN_HEADER set to false and its CorsInterceptor then echoes whatever Origin the request carries. A page on any origin can therefore make a cross origin request to that endpoint with the user\u0027s cookies and read the response, although reading anything useful also requires the push identifier of that session. Applications that do not use @Push are not affected, and neither is the WebSocket transport. The behaviour was introduced in January 2015 and is present in every Flow release and in Vaadin Framework from 7.1.0, which is when push was added.\n\n\nUsers of affected versions should apply the following mitigation or upgrade. Releases that have fixed this issue include:\n\nProduct version\nVaadin 14.14.0 - 14.14.7\nVaadin 23.6.0 - 23.6.16\nVaadin 24.4.0 - 24.4.25\nVaadin 24.5.0 - 24.5.15\nVaadin 24.6.0 - 24.6.13\nVaadin 24.7.0 - 24.7.16\nVaadin 24.8.0 - 24.8.17\nVaadin 24.9.0 - 24.9.23\nVaadin 24.10.0 - 24.10.11\nVaadin 25.0.0 - 25.0.13\nVaadin 25.1.0 - 25.1.13\nVaadin 25.2.0 - 25.2.10\nVaadin 25.3.0 - 25.3.2\nVaadin Framework 7.1.0 - 7.7.54\nVaadin Framework 8.0.0 - 8.32.1\n\nMitigation\nUpgrade to 14.14.8\nUpgrade to 23.6.17\nUpgrade to 24.4.26\nUpgrade to 24.7.17\nUpgrade to 24.7.17\nUpgrade to 24.7.17\nUpgrade to 24.9.24\nUpgrade to 24.9.24\nUpgrade to 24.10.12\nUpgrade to 25.2.11\nUpgrade to 25.2.11\nUpgrade to 25.2.11\nUpgrade to 25.3.3\nUpgrade to 7.7.55\nUpgrade to 8.32.2\n\nPlease note that Vaadin versions 10-13 and 15-22 are no longer supported and you should update either to the latest 14, 23, 24, 25 version.\n\nArtifacts under com.vaadin\nMaven coordinates / Vulnerable versions / Fixed version\nvaadin / 14.14.0 - 14.14.7 / \u003e=14.14.8\nvaadin / 23.6.0 - 23.6.16 / \u003e=23.6.17\nvaadin / 24.4.0 - 24.4.25 / \u003e=24.4.26\nvaadin / 24.5.0 - 24.5.15 / \u003e=24.7.17\nvaadin / 24.6.0 - 24.6.13 / \u003e=24.7.17\nvaadin / 24.7.0 - 24.7.16 / \u003e=24.7.17\nvaadin / 24.8.0 - 24.8.17 / \u003e=24.9.24\nvaadin / 24.9.0 - 24.9.23 / \u003e=24.9.24\nvaadin / 24.10.0 - 24.10.11 / \u003e=24.10.12\nvaadin / 25.0.0 - 25.0.13 / \u003e=25.2.11\nvaadin / 25.1.0 - 25.1.13 / \u003e=25.2.11\nvaadin / 25.2.0 - 25.2.10 / \u003e=25.2.11\nvaadin / 25.3.0 - 25.3.2 / \u003e=25.3.3\nvaadin-core / 14.14.0 - 14.14.7 / \u003e=14.14.8\nvaadin-core / 23.6.0 - 23.6.16 / \u003e=23.6.17\nvaadin-core / 24.4.0 - 24.4.25 / \u003e=24.4.26\nvaadin-core / 24.5.0 - 24.5.15 / \u003e=24.7.17\nvaadin-core / 24.6.0 - 24.6.13 / \u003e=24.7.17\nvaadin-core / 24.7.0 - 24.7.16 / \u003e=24.7.17\nvaadin-core / 24.8.0 - 24.8.17 / \u003e=24.9.24\nvaadin-core / 24.9.0 - 24.9.23 / \u003e=24.9.24\nvaadin-core / 24.10.0 - 24.10.11 / \u003e=24.10.12\nvaadin-core / 25.0.0 - 25.0.13 / \u003e=25.2.11\nvaadin-core / 25.1.0 - 25.1.13 / \u003e=25.2.11\nvaadin-core / 25.2.0 - 25.2.10 / \u003e=25.2.11\nvaadin-core / 25.3.0 - 25.3.2 / \u003e=25.3.3\nflow-server / 2.13.0 - 2.13.7 / \u003e=2.13.8\nflow-server / 23.6.0 - 23.6.15 / \u003e=23.6.16\nflow-server / 24.4.0 - 24.4.18 / \u003e=24.4.19\nflow-server / 24.5.0 - 24.5.17 / \u003e=24.7.17\nflow-server / 24.6.0 - 24.6.14 / \u003e=24.7.17\nflow-server / 24.7.0 - 24.7.15 / \u003e=24.7.16\nflow-server / 24.8.0 - 24.8.16 / \u003e=24.9.24\nflow-server / 24.9.0 - 24.9.28 / \u003e=24.9.29\nflow-server / 24.10.0 - 24.10.14 / \u003e=24.10.15\nflow-server / 25.0.0 - 25.0.15 / \u003e=25.2.11\nflow-server / 25.1.0 - 25.1.18 / \u003e=25.1.19\nflow-server / 25.2.0 - 25.2.12 / \u003e=25.2.13\nflow-server / 25.3.0 - 25.3.3 / \u003e=25.3.4\nvaadin-server / 7.1.0 - 7.7.54 / \u003e=7.7.55\nvaadin-server / 8.0.0 - 8.32.1 / \u003e=8.32.2\nvaadin-server-mpr-jakarta / 7.7.36 - 7.7.54 / \u003e=7.7.55\nvaadin-server-mpr-jakarta / 8.18.0 - 8.32.1 / \u003e=8.32.2"
}
],
"impacts": [
{
"capecId": "CAPEC-468",
"descriptions": [
{
"lang": "en",
"value": "CAPEC-468 Generic Cross-Browser Cross-Domain Theft"
}
]
}
],
"metrics": [
{
"cvssV4_0": {
"Automatable": "NO",
"Recovery": "AUTOMATIC",
"Safety": "NEGLIGIBLE",
"attackComplexity": "HIGH",
"attackRequirements": "NONE",
"attackVector": "NETWORK",
"baseScore": 2.3,
"baseSeverity": "LOW",
"privilegesRequired": "NONE",
"providerUrgency": "CLEAR",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "PASSIVE",
"valueDensity": "DIFFUSE",
"vectorString": "CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N",
"version": "4.0",
"vulnAvailabilityImpact": "NONE",
"vulnConfidentialityImpact": "LOW",
"vulnIntegrityImpact": "NONE",
"vulnerabilityResponseEffort": "LOW"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-942",
"description": "CWE-942 Permissive Cross-domain Policy with Untrusted Domains",
"lang": "en",
"type": "CWE"
},
{
"cweId": "CWE-346",
"description": "CWE-346 Origin Validation Error",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-10-27T13:03:37.752Z",
"orgId": "9e0f3122-90e9-42d5-93de-8c6b98deef7e",
"shortName": "Vaadin"
},
"references": [
{
"url": "https://vaadin.com/security/cve-2026-110737"
},
{
"url": "https://github.com/vaadin/flow/issues/26214"
},
{
"url": "https://github.com/vaadin/flow/pull/26215"
}
],
"solutions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "\u003cb\u003e\u003cspan style=\"background-color: transparent;\"\u003eUsers of affected versions should apply the following mitigation or upgrade.\u003c/span\u003e\u003c/b\u003e\u003cbr\u003e"
}
],
"value": "Users of affected versions should apply the following mitigation or upgrade."
}
],
"source": {
"discovery": "UNKNOWN"
},
"title": "Push Endpoint Returns Permissive CORS Headers",
"workarounds": [
{
"lang": "en",
"value": "Set the servlet init parameter org.atmosphere.cpr.dropAccessControlAllowOriginHeader to true on the Vaadin servlet, which stops the header being emitted without upgrading. In a Spring Boot application the Vaadin servlet has to be registered explicitly for the parameter to be applied."
}
],
"x_generator": {
"engine": "Vulnogram 0.5.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "9e0f3122-90e9-42d5-93de-8c6b98deef7e",
"assignerShortName": "Vaadin",
"cveId": "CVE-2026-110737",
"datePublished": "2026-10-27T10:26:37.752Z",
"dateReserved": "2026-10-14T16:07:47.846Z",
"dateUpdated": "2026-10-27T13:03:37.752Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2026-110737",
"date": "2026-10-29",
"epss": "0.00195",
"percentile": "0.09231"
},
"nvd": {
"cve": {
"affected": [
{
"affectedData": [
{
"collectionURL": "https://repo.maven.apache.org/maven2",
"defaultStatus": "unaffected",
"packageName": "com.vaadin:vaadin",
"product": "vaadin",
"repo": "https://github.com/vaadin/platform",
"vendor": "vaadin",
"versions": [
{
"lessThan": "14.14.8",
"status": "affected",
"version": "14.14.0",
"versionType": "maven"
},
{
"lessThan": "23.6.17",
"status": "affected",
"version": "23.6.0",
"versionType": "maven"
},
{
"lessThan": "24.4.26",
"status": "affected",
"version": "24.4.0",
"versionType": "maven"
},
{
"lessThanOrEqual": "24.5.15",
"status": "affected",
"version": "24.5.0",
"versionType": "maven"
},
{
"lessThanOrEqual": "24.6.13",
"status": "affected",
"version": "24.6.0",
"versionType": "maven"
},
{
"lessThan": "24.7.17",
"status": "affected",
"version": "24.7.0",
"versionType": "maven"
},
{
"lessThanOrEqual": "24.8.17",
"status": "affected",
"version": "24.8.0",
"versionType": "maven"
},
{
"lessThan": "24.9.24",
"status": "affected",
"version": "24.9.0",
"versionType": "maven"
},
{
"lessThan": "24.10.12",
"status": "affected",
"version": "24.10.0",
"versionType": "maven"
},
{
"lessThanOrEqual": "25.0.13",
"status": "affected",
"version": "25.0.0",
"versionType": "maven"
},
{
"lessThanOrEqual": "25.1.13",
"status": "affected",
"version": "25.1.0",
"versionType": "maven"
},
{
"lessThan": "25.2.11",
"status": "affected",
"version": "25.2.0",
"versionType": "maven"
},
{
"lessThan": "25.3.3",
"status": "affected",
"version": "25.3.0",
"versionType": "maven"
}
]
},
{
"collectionURL": "https://repo.maven.apache.org/maven2",
"defaultStatus": "unaffected",
"packageName": "com.vaadin:vaadin-core",
"product": "vaadin",
"repo": "https://github.com/vaadin/platform",
"vendor": "vaadin",
"versions": [
{
"lessThan": "14.14.8",
"status": "affected",
"version": "14.14.0",
"versionType": "maven"
},
{
"lessThan": "23.6.17",
"status": "affected",
"version": "23.6.0",
"versionType": "maven"
},
{
"lessThan": "24.4.26",
"status": "affected",
"version": "24.4.0",
"versionType": "maven"
},
{
"lessThanOrEqual": "24.5.15",
"status": "affected",
"version": "24.5.0",
"versionType": "maven"
},
{
"lessThanOrEqual": "24.6.13",
"status": "affected",
"version": "24.6.0",
"versionType": "maven"
},
{
"lessThan": "24.7.17",
"status": "affected",
"version": "24.7.0",
"versionType": "maven"
},
{
"lessThanOrEqual": "24.8.17",
"status": "affected",
"version": "24.8.0",
"versionType": "maven"
},
{
"lessThan": "24.9.24",
"status": "affected",
"version": "24.9.0",
"versionType": "maven"
},
{
"lessThan": "24.10.12",
"status": "affected",
"version": "24.10.0",
"versionType": "maven"
},
{
"lessThanOrEqual": "25.0.13",
"status": "affected",
"version": "25.0.0",
"versionType": "maven"
},
{
"lessThanOrEqual": "25.1.13",
"status": "affected",
"version": "25.1.0",
"versionType": "maven"
},
{
"lessThan": "25.2.11",
"status": "affected",
"version": "25.2.0",
"versionType": "maven"
},
{
"lessThan": "25.3.3",
"status": "affected",
"version": "25.3.0",
"versionType": "maven"
}
]
},
{
"collectionURL": "https://repo.maven.apache.org/maven2",
"defaultStatus": "unaffected",
"packageName": "com.vaadin:flow-server",
"product": "flow",
"repo": "https://github.com/vaadin/flow",
"vendor": "vaadin",
"versions": [
{
"lessThan": "2.13.8",
"status": "affected",
"version": "2.13.0",
"versionType": "maven"
},
{
"lessThan": "23.6.16",
"status": "affected",
"version": "23.6.0",
"versionType": "maven"
},
{
"lessThan": "24.4.19",
"status": "affected",
"version": "24.4.0",
"versionType": "maven"
},
{
"lessThanOrEqual": "24.5.17",
"status": "affected",
"version": "24.5.0",
"versionType": "maven"
},
{
"lessThanOrEqual": "24.6.14",
"status": "affected",
"version": "24.6.0",
"versionType": "maven"
},
{
"lessThan": "24.7.16",
"status": "affected",
"version": "24.7.0",
"versionType": "maven"
},
{
"lessThanOrEqual": "24.8.16",
"status": "affected",
"version": "24.8.0",
"versionType": "maven"
},
{
"lessThan": "24.9.29",
"status": "affected",
"version": "24.9.0",
"versionType": "maven"
},
{
"lessThan": "24.10.15",
"status": "affected",
"version": "24.10.0",
"versionType": "maven"
},
{
"lessThanOrEqual": "25.0.15",
"status": "affected",
"version": "25.0.0",
"versionType": "maven"
},
{
"lessThan": "25.1.19",
"status": "affected",
"version": "25.1.0",
"versionType": "maven"
},
{
"lessThan": "25.2.13",
"status": "affected",
"version": "25.2.0",
"versionType": "maven"
},
{
"lessThan": "25.3.4",
"status": "affected",
"version": "25.3.0",
"versionType": "maven"
}
]
},
{
"collectionURL": "https://repo.maven.apache.org/maven2",
"defaultStatus": "unaffected",
"packageName": "com.vaadin:vaadin-server",
"product": "framework",
"repo": "https://github.com/vaadin/framework",
"vendor": "vaadin",
"versions": [
{
"lessThan": "7.7.55",
"status": "affected",
"version": "7.1.0",
"versionType": "maven"
},
{
"lessThan": "8.32.2",
"status": "affected",
"version": "8.0.0",
"versionType": "maven"
}
]
},
{
"collectionURL": "https://repo.maven.apache.org/maven2",
"defaultStatus": "unaffected",
"packageName": "com.vaadin:vaadin-server-mpr-jakarta",
"product": "framework",
"repo": "https://github.com/vaadin/framework",
"vendor": "vaadin",
"versions": [
{
"lessThan": "7.7.55",
"status": "affected",
"version": "7.7.36",
"versionType": "maven"
},
{
"lessThan": "8.32.2",
"status": "affected",
"version": "8.18.0",
"versionType": "maven"
}
]
}
],
"source": "security@vaadin.com"
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "The push endpoint of a Vaadin application that uses server push reflects the request Origin into the Access-Control-Allow-Origin response header and allows credentials, because Flow configures Atmosphere with DROP_ACCESS_CONTROL_ALLOW_ORIGIN_HEADER set to false and its CorsInterceptor then echoes whatever Origin the request carries. A page on any origin can therefore make a cross origin request to that endpoint with the user\u0027s cookies and read the response, although reading anything useful also requires the push identifier of that session. Applications that do not use @Push are not affected, and neither is the WebSocket transport. The behaviour was introduced in January 2015 and is present in every Flow release and in Vaadin Framework from 7.1.0, which is when push was added.\n\n\nUsers of affected versions should apply the following mitigation or upgrade. Releases that have fixed this issue include:\n\nProduct version\nVaadin 14.14.0 - 14.14.7\nVaadin 23.6.0 - 23.6.16\nVaadin 24.4.0 - 24.4.25\nVaadin 24.5.0 - 24.5.15\nVaadin 24.6.0 - 24.6.13\nVaadin 24.7.0 - 24.7.16\nVaadin 24.8.0 - 24.8.17\nVaadin 24.9.0 - 24.9.23\nVaadin 24.10.0 - 24.10.11\nVaadin 25.0.0 - 25.0.13\nVaadin 25.1.0 - 25.1.13\nVaadin 25.2.0 - 25.2.10\nVaadin 25.3.0 - 25.3.2\nVaadin Framework 7.1.0 - 7.7.54\nVaadin Framework 8.0.0 - 8.32.1\n\nMitigation\nUpgrade to 14.14.8\nUpgrade to 23.6.17\nUpgrade to 24.4.26\nUpgrade to 24.7.17\nUpgrade to 24.7.17\nUpgrade to 24.7.17\nUpgrade to 24.9.24\nUpgrade to 24.9.24\nUpgrade to 24.10.12\nUpgrade to 25.2.11\nUpgrade to 25.2.11\nUpgrade to 25.2.11\nUpgrade to 25.3.3\nUpgrade to 7.7.55\nUpgrade to 8.32.2\n\nPlease note that Vaadin versions 10-13 and 15-22 are no longer supported and you should update either to the latest 14, 23, 24, 25 version.\n\nArtifacts under com.vaadin\nMaven coordinates / Vulnerable versions / Fixed version\nvaadin / 14.14.0 - 14.14.7 / \u003e=14.14.8\nvaadin / 23.6.0 - 23.6.16 / \u003e=23.6.17\nvaadin / 24.4.0 - 24.4.25 / \u003e=24.4.26\nvaadin / 24.5.0 - 24.5.15 / \u003e=24.7.17\nvaadin / 24.6.0 - 24.6.13 / \u003e=24.7.17\nvaadin / 24.7.0 - 24.7.16 / \u003e=24.7.17\nvaadin / 24.8.0 - 24.8.17 / \u003e=24.9.24\nvaadin / 24.9.0 - 24.9.23 / \u003e=24.9.24\nvaadin / 24.10.0 - 24.10.11 / \u003e=24.10.12\nvaadin / 25.0.0 - 25.0.13 / \u003e=25.2.11\nvaadin / 25.1.0 - 25.1.13 / \u003e=25.2.11\nvaadin / 25.2.0 - 25.2.10 / \u003e=25.2.11\nvaadin / 25.3.0 - 25.3.2 / \u003e=25.3.3\nvaadin-core / 14.14.0 - 14.14.7 / \u003e=14.14.8\nvaadin-core / 23.6.0 - 23.6.16 / \u003e=23.6.17\nvaadin-core / 24.4.0 - 24.4.25 / \u003e=24.4.26\nvaadin-core / 24.5.0 - 24.5.15 / \u003e=24.7.17\nvaadin-core / 24.6.0 - 24.6.13 / \u003e=24.7.17\nvaadin-core / 24.7.0 - 24.7.16 / \u003e=24.7.17\nvaadin-core / 24.8.0 - 24.8.17 / \u003e=24.9.24\nvaadin-core / 24.9.0 - 24.9.23 / \u003e=24.9.24\nvaadin-core / 24.10.0 - 24.10.11 / \u003e=24.10.12\nvaadin-core / 25.0.0 - 25.0.13 / \u003e=25.2.11\nvaadin-core / 25.1.0 - 25.1.13 / \u003e=25.2.11\nvaadin-core / 25.2.0 - 25.2.10 / \u003e=25.2.11\nvaadin-core / 25.3.0 - 25.3.2 / \u003e=25.3.3\nflow-server / 2.13.0 - 2.13.7 / \u003e=2.13.8\nflow-server / 23.6.0 - 23.6.15 / \u003e=23.6.16\nflow-server / 24.4.0 - 24.4.18 / \u003e=24.4.19\nflow-server / 24.5.0 - 24.5.17 / \u003e=24.7.17\nflow-server / 24.6.0 - 24.6.14 / \u003e=24.7.17\nflow-server / 24.7.0 - 24.7.15 / \u003e=24.7.16\nflow-server / 24.8.0 - 24.8.16 / \u003e=24.9.24\nflow-server / 24.9.0 - 24.9.28 / \u003e=24.9.29\nflow-server / 24.10.0 - 24.10.14 / \u003e=24.10.15\nflow-server / 25.0.0 - 25.0.15 / \u003e=25.2.11\nflow-server / 25.1.0 - 25.1.18 / \u003e=25.1.19\nflow-server / 25.2.0 - 25.2.12 / \u003e=25.2.13\nflow-server / 25.3.0 - 25.3.3 / \u003e=25.3.4\nvaadin-server / 7.1.0 - 7.7.54 / \u003e=7.7.55\nvaadin-server / 8.0.0 - 8.32.1 / \u003e=8.32.2\nvaadin-server-mpr-jakarta / 7.7.36 - 7.7.54 / \u003e=7.7.55\nvaadin-server-mpr-jakarta / 8.18.0 - 8.32.1 / \u003e=8.32.2"
}
],
"id": "CVE-2026-110737",
"lastModified": "2026-10-27T16:03:45.247",
"metrics": {
"cvssMetricV40": [
{
"cvssData": {
"Automatable": "NOT_DEFINED",
"Recovery": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
"attackComplexity": "HIGH",
"attackRequirements": "NONE",
"attackVector": "NETWORK",
"availabilityRequirement": "NOT_DEFINED",
"baseScore": 2.3,
"baseSeverity": "LOW",
"confidentialityRequirement": "NOT_DEFINED",
"exploitMaturity": "NOT_DEFINED",
"integrityRequirement": "NOT_DEFINED",
"modifiedAttackComplexity": "NOT_DEFINED",
"modifiedAttackRequirements": "NOT_DEFINED",
"modifiedAttackVector": "NOT_DEFINED",
"modifiedPrivilegesRequired": "NOT_DEFINED",
"modifiedSubAvailabilityImpact": "NOT_DEFINED",
"modifiedSubConfidentialityImpact": "NOT_DEFINED",
"modifiedSubIntegrityImpact": "NOT_DEFINED",
"modifiedUserInteraction": "NOT_DEFINED",
"modifiedVulnAvailabilityImpact": "NOT_DEFINED",
"modifiedVulnConfidentialityImpact": "NOT_DEFINED",
"modifiedVulnIntegrityImpact": "NOT_DEFINED",
"privilegesRequired": "NONE",
"providerUrgency": "NOT_DEFINED",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "PASSIVE",
"valueDensity": "NOT_DEFINED",
"vectorString": "CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
"version": "4.0",
"vulnAvailabilityImpact": "NONE",
"vulnConfidentialityImpact": "LOW",
"vulnIntegrityImpact": "NONE",
"vulnerabilityResponseEffort": "NOT_DEFINED"
},
"source": "security@vaadin.com",
"type": "Secondary"
}
]
},
"published": "2026-10-27T11:17:27.020",
"references": [
{
"source": "security@vaadin.com",
"url": "https://github.com/vaadin/flow/issues/26214"
},
{
"source": "security@vaadin.com",
"url": "https://github.com/vaadin/flow/pull/26215"
},
{
"source": "security@vaadin.com",
"url": "https://vaadin.com/security/cve-2026-110737"
}
],
"sourceIdentifier": "security@vaadin.com",
"vulnStatus": "Awaiting Analysis",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-346"
},
{
"lang": "en",
"value": "CWE-942"
}
],
"source": "security@vaadin.com",
"type": "Secondary"
}
]
}
}
}
}
Loading…
Loading…
Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Vulnerability timeline
Sightings and recorded dates, grouped by day · UTC
How durations are calculated
Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.
Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.
Loading timeline…
Loading…
Loading…
The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
Loading…
Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.