CVE-2021-31406
lowpriority · track · 10EPSS 0.002 · 11 %ileEUUSEPSS · scored 2026-10-27
Non-constant-time comparison of CSRF tokens in endpoint request handler in com.vaadin:flow-server versions 3.0.0 through 5.0.3 (Vaadin 15.0.0 through 18.0.6), and com.vaadin:fusion-endpoint version 6.0.0 (Vaadin 19.0.0) allows attacker to guess a security token for Fusion endpoints via timing attack.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · low–medium · 1.9–4
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (10)
Products and version ranges known to be affected.
advisories (1)
Vendor and ecosystem advisories describing this.
- GHSA-p7jq-v8jp-j424Timing side channel vulnerability in endpoint request handler in Vaadin 15-192021-04-19ghsa · osvUS
Non-constant-time comparison of CSRF tokens in endpoint request handler in `com.vaadin:flow-server` versions 3.0.0 through 5.0.3 (Vaadin 15.0.0 through 18.0.6), and com.vaadin:fusion-endpoint version 6.0.0 (Vaadin 19.0.0) allows attacker to guess a security token for Fusion endpoints via timing attack. - https://vaadin.com/security/cve-2021-31406
also known as (3)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (7)
External citations — patches, advisories, analysis.
- https://github.com/vaadin/flow/pull/10157cnnvd
- https://nvd.nist.gov/vuln/detail/CVE-2021-31406cnnvd
- https://vaadin.com/security/cve-2021-31406cnnvd
- https://github.com/vaadin/flow/pull/10157enisa_euvd
- https://vaadin.com/security/cve-2021-31406enisa_euvd
- https://github.com/vaadin/flow/pull/10157PatchThird Party Advisorynvd
- https://vaadin.com/security/cve-2021-31406Vendor Advisorynvd
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