CVE-2026-2742

mediumpriority · track · 21EPSS 0.005 · 40 %ileDEEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.48% (40th) EPSS

CVSS 5.3 · medium

Is it mine?

28 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · cert_bund · nvd

EPSS · scored 2026-10-23

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.

cvss

Technical severity, 0–10. One row per scoring source.

5.3

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · low–medium · 1.3–5.3

v3.15.3mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:Nprimary · NVD / NIST USexploitability 3.9 · impact 1.4

v4.05.3mediumCVSS: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:Ambersecondary · ENISA EU

v4.05.3mediumCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:L/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:N/AU:Y/R:A/V:D/RE:L/U:Ambersecondary · security@vaadin.com

v4.01.3lowCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:L/E:U/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:N/AU:Y/R:A/V:D/RE:L/U:Ambersecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: yes · Technical Impact: partialcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-284USCWE-284US

affected products (28)

Products and version ranges known to be affected.

Open Source Vaadin <14.14.1all versionscert_bundDE
Open Source Vaadin <23.6.7all versionscert_bundDE
Open Source Vaadin <24.9.8all versionscert_bundDE
Open Source Vaadin <25.0.2all versionscert_bundDE
Open Source Vaadin< 14.14.1cert_bundDE
Open Source Vaadin< 23.6.7cert_bundDE
Open Source Vaadin< 24.9.8cert_bundDE
Open Source Vaadin< 25.0.2cert_bundDE
Vaadin Flow≤ 24.0.0 ≤24.9.7enisa_euvdEU
Vaadin Flow≤ 3.0.0 ≤23.6.7enisa_euvdEU
Vaadin Flow≤ 1.0.0 ≤2.13.0enisa_euvdEU
Vaadin Flow25.0.0 → 25.0.1enisa_euvdEU
Vaadin Vaadin≤ 15.0.0 ≤23.6.6enisa_euvdEU
Vaadin Vaadin≤ 25.0.0 ≤25.0.1enisa_euvdEU
Vaadin Vaadin≤ 24.0.0 ≤24.9.7enisa_euvdEU
Vaadin Vaadin≤ 10.0.0 ≤14.14.0enisa_euvdEU
vaadin vaadin10.0.0 → 14.14.1nvdUScpe:2.3:a:vaadin:vaadin:*:*:*:*:*:*:*:*
vaadin vaadin15.0.0 → 23.6.7nvdUScpe:2.3:a:vaadin:vaadin:*:*:*:*:*:*:*:*
vaadin vaadin24.0.0 → 24.9.8nvdUScpe:2.3:a:vaadin:vaadin:*:*:*:*:*:*:*:*
vaadin vaadin25.0.0 → 25.0.2nvdUScpe:2.3:a:vaadin:vaadin:*:*:*:*:*:*:*:*

showing 20 of 28

advisories (2)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2026-0675Vaadin: Mehrere SchwachstellenDeutsch2026-03-10csaf · cert_bundDE
Ein entfernter, authentisierter Angreifer kann mehrere Schwachstellen in Vaadin ausnutzen, um Sicherheitsmaßnahmen zu umgehen, Daten zu manipulieren und vertrauliche Informationen offenzulegen.
GHSA-rjgh-wgc7-m37jVaadin Vulnerable to Authentication Bypass When Accessing the /VAADIN Endpoint Without a Trailing Slash2026-03-10ghsa · osvUS
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.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd cert_bund nvd osv NVD CVE.org MITRE

published 2026-03-10modified 2026-06-17

references (21)

External citations — patches, advisories, analysis.

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