Regular expression denial of service (ReDoS) in EmailField component in Vaadin 14 and 15-17

published 2021-04-19 5 y ago modified 2026-06-17 4 mo ago also GHSA-2wqp-jmcc-mc77 , EUVD-2021-0740

cvss: 7.5; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 1.1%; EPSS 1.1% chance of exploitation in 30 days, percentile 66%
public exploits: 0; none known

Unsafe validation RegEx in EmailField component in com.vaadin:vaadin-text-field-flow versions 2.0.4 through 2.3.2 (Vaadin 14.0.6 through 14.4.3), and 3.0.0 through 4.0.2 (Vaadin 15.0.0 through 17.0.10) allows attackers to cause uncontrolled resource consumption by submitting malicious email addresses.

Patch / fix

fixed in 3 links 1

maven com.vaadin:vaadin-bom 14.4.4, 17.0.11
vaadin flow 2.3.3, 4.0.3
vaadin vaadin 14.4.4, 17.0.11

github.com/vaadin/flow-components#442 pull request

Exploit prediction

1.13% chance of exploitation in the next 30 days, higher than 66% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD	2.0	5.0	AV:N/AC:L/Au:N/C:N/I:N/A:P
GitHub	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem	package	affected	fixed in
maven	com.vaadin:vaadin-bom	>=14.0.6, <14.4.4 >=15.0.0, <17.0.11	14.4.4 17.0.11

Affected products

Vaadin Vaadin
Vaadin vaadin-text-field-flow

Classification

Weakness

CWE-400 Uncontrolled Resource Consumption

References

github.com /vaadin/flow-components/pull/442
web, patch, third-party-advisory
vaadin.com /security/cve-2021-31405
web, vendor-advisory
github.com /vaadin/platform/security/advisories/GHSA-2wqp-jmcc-mc77
web
nvd.nist.gov /vuln/detail/CVE-2021-31405
advisory

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary