CVE-2026-2742 (GCVE-0-2026-2742)

Vulnerability from cvelistv5 – Published: 2026-03-10 12:08 – Updated: 2026-03-16 10:52
VLAI?
Title
Unauthorized session creation via reserved framework path access
Summary
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 you should update either to the latest 14, 23, 24, 25 version.
Severity ?
5.3 (Medium)
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
CWE
  • CWE-284 - Improper Access Control
Assigner
References
Impacted products
Vendor Product Version
vaadin vaadin Affected: 10.0.0 , ≤ 14.14.0 (maven)
Affected: 15.0.0 , ≤ 23.6.6 (maven)
Affected: 24.0.0 , ≤ 24.9.7 (maven)
Affected: 25.0.0 , ≤ 25.0.1 (maven)
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    vaadin flow Affected: 1.0.0 , ≤ 2.13.0 (maven)
Affected: 3.0.0 , ≤ 23.6.7 (maven)
Affected: 24.0.0 , ≤ 24.9.7 (maven)
Affected: 25.0.0 , < 25.0.1 (maven)
Create a notification for this product.
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24.9.7 to\u0026nbsp;24.9.8, and\u0026nbsp;25.0.0-25.0.1 upgrade to\u0026nbsp;25.0.2 or newer.\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\u003e\u003c/span\u003e\", \"base64\": false}]}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-284\", \"description\": \"CWE-284 Improper Access Control\"}]}], \"providerMetadata\": {\"orgId\": \"9e0f3122-90e9-42d5-93de-8c6b98deef7e\", \"shortName\": \"Vaadin\", \"dateUpdated\": \"2026-03-16T10:52:30.637Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-2742\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-03-16T10:52:30.637Z\", \"dateReserved\": \"2026-02-19T12:00:12.056Z\", \"assignerOrgId\": \"9e0f3122-90e9-42d5-93de-8c6b98deef7e\", \"datePublished\": \"2026-03-10T12:08:48.738Z\", \"assignerShortName\": \"Vaadin\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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Tags
Taxonomy of the tags.




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.



Detection rules are retrieved from Rulezet.