GHSA-RJGH-WGC7-M37J
Vulnerability from github – Published: 2026-03-10 18:31 – Updated: 2026-03-11 19:00
VLAI?
Summary
Vaadin Vulnerable to Authentication Bypass When Accessing the /VAADIN Endpoint Without a Trailing Slash
Details
An authentication bypass vulnerability exists in Vaadin 14.0.0 through 14.14.0, 23.0.0 through 23.6.6, 24.0.0 through 24.9.7 and 25.0.0 through 25.0.1, applications using Spring Security due to inconsistent path pattern matching of reserved framework paths.
Accessing the /VAADIN endpoint without a trailing slash bypasses security filters, and allowing unauthenticated users to trigger framework initialization and create sessions without proper authorization.
Users of affected versions using Spring Security should upgrade as follows: 14.0.0-14.14.0 upgrade to 14.14.1, 23.0.0-23.6.6 to 23.6.7, 24.0.0 - 24.9.7 to 24.9.8, and 25.0.0-25.0.1 upgrade to 25.0.2 or newer.
Please note that Vaadin versions 10-13 and 15-22 are no longer supported and users should update either to the latest 14, 23, 24, 25 version.
Severity ?
{
"affected": [
{
"package": {
"ecosystem": "Maven",
"name": "com.vaadin:flow-server"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "14.14.1"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "Maven",
"name": "com.vaadin:flow-server"
},
"ranges": [
{
"events": [
{
"introduced": "23.0.0"
},
{
"fixed": "23.6.7"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "Maven",
"name": "com.vaadin:flow-server"
},
"ranges": [
{
"events": [
{
"introduced": "24.0.0"
},
{
"fixed": "24.9.8"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "Maven",
"name": "com.vaadin:flow-server"
},
"ranges": [
{
"events": [
{
"introduced": "25.0.0"
},
{
"fixed": "25.0.2"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "Maven",
"name": "com.vaadin:vaadin"
},
"ranges": [
{
"events": [
{
"introduced": "25.0.0"
},
{
"fixed": "25.0.2"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "Maven",
"name": "com.vaadin:vaadin"
},
"ranges": [
{
"events": [
{
"introduced": "24.0.0"
},
{
"fixed": "24.9.8"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "Maven",
"name": "com.vaadin:vaadin"
},
"ranges": [
{
"events": [
{
"introduced": "23.0.0"
},
{
"fixed": "23.6.7"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "Maven",
"name": "com.vaadin:vaadin"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "14.14.1"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2026-2742"
],
"database_specific": {
"cwe_ids": [
"CWE-284"
],
"github_reviewed": true,
"github_reviewed_at": "2026-03-11T19:00:34Z",
"nvd_published_at": "2026-03-10T18:18:49Z",
"severity": "MODERATE"
},
"details": "An authentication bypass vulnerability exists in Vaadin 14.0.0 through 14.14.0, 23.0.0 through 23.6.6, 24.0.0 through 24.9.7 and 25.0.0 through 25.0.1,\u00a0applications using Spring Security due to inconsistent path pattern matching of reserved framework paths.\n\nAccessing the /VAADIN endpoint without a trailing slash bypasses security filters, and allowing unauthenticated users to trigger framework initialization and create sessions without proper authorization.\n\nUsers of affected versions using Spring Security should upgrade as follows: 14.0.0-14.14.0 upgrade to 14.14.1,\u00a023.0.0-23.6.6 to\u00a023.6.7,\u00a024.0.0 - 24.9.7 to\u00a024.9.8, and\u00a025.0.0-25.0.1 upgrade to\u00a025.0.2 or newer.\n\nPlease note that Vaadin versions 10-13 and 15-22 are no longer supported and users should update either to the latest 14, 23, 24, 25 version.",
"id": "GHSA-rjgh-wgc7-m37j",
"modified": "2026-03-11T19:00:34Z",
"published": "2026-03-10T18:31:21Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-2742"
},
{
"type": "WEB",
"url": "https://github.com/vaadin/flow/pull/22998"
},
{
"type": "WEB",
"url": "https://github.com/vaadin/flow/pull/23033"
},
{
"type": "WEB",
"url": "https://github.com/vaadin/flow/pull/23034"
},
{
"type": "WEB",
"url": "https://github.com/vaadin/flow/pull/23037"
},
{
"type": "WEB",
"url": "https://github.com/vaadin/flow/pull/23052"
},
{
"type": "WEB",
"url": "https://github.com/vaadin/flow/pull/23057"
},
{
"type": "PACKAGE",
"url": "https://github.com/vaadin/flow"
},
{
"type": "WEB",
"url": "https://vaadin.com/security/cve-2026-2742"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:L/S:N/AU:Y/R:A/V:D/RE:L/U:Amber",
"type": "CVSS_V4"
}
],
"summary": "Vaadin Vulnerable to Authentication Bypass When Accessing the /VAADIN Endpoint Without a Trailing Slash"
}
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Sightings
| Author | Source | Type | Date |
|---|
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.
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