CVE-2026-27192: Feathersjs is a framework for creating web APIs and real-time applications with TypeScript or JavaScript

Routine

HIGH 8.1REMOTEUPGRADE

CVE-2026-27192 is a high-severity flaw (CVSS 8.1) affecting feathers. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Feathersjs is a framework for creating web APIs and real-time applications with TypeScript or JavaScript. In versions 5.0.39 and below, origin validation uses startsWith() for comparison, allowing attackers to bypass the check by registering a domain that shares a common prefix with an allowed origin.The getAllowedOrigin() function checks if the Referer header starts with any allowed origin, and this comparison is insufficient as it only validate

Why this priority

High severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	8.1 (High)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	0.3% (top 81%)
CISA exploited list	No
Weakness	CWE-346
Published	2026-02-21
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: feathersjs

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-02-21 04:15 UTCPublished CVE record published
2026-06-17 10:26 UTCUpdated Record last modified

feathersjs feathers UPGRADE

Affected: < 5.0.40

Fixed in: 5.0.40

Safe to downgrade to: no unaffected older release

1. Check installed version

npm ls feathers

2. UPGRADE to 5.0.40

npm install feathers@">=5.0.40"

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-27192?

feathers: upgrade to 5.0.40. Exact commands for each OS are on this page.

Is CVE-2026-27192 being exploited?

CVE-2026-27192 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-27192 affect?

CVE-2026-27192 affects feathers. Severity is high (CVSS 8.1). Feathersjs is a framework for creating web APIs and real-time applications with TypeScript or JavaScript. In versions 5.0.39 and below, origin validation uses startsWith() for comparison, allowing attackers to bypass the check by registerin

How urgent is CVE-2026-27192?

Priority 38/100. High severity; Remotely exploitable, no login, no user action

Related CVEs

CVE-2026-29793 CRITICAL 9.8 UPGRADE Feathersjs is a framework for creating web APIs and real-time applications with TypeScript or JavaScript
CVE-2026-29792 CRITICAL 9.8 UPGRADE Feathersjs is a framework for creating web APIs and real-time applications with TypeScript or JavaScript
CVE-2026-27193 MEDIUM 5.3 UPGRADE Feathersjs is a framework for creating web APIs and real-time applications with TypeScript or JavaScript
CVE-2026-27191 MEDIUM 6.1 UPGRADE Feathersjs is a framework for creating web APIs and real-time applications with TypeScript or JavaScript

References

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