Information disclosure in Feathersjs Feathers
CVE-2026-27193
Feathersjs is a framework for creating web APIs and real-time applications with TypeScript or JavaScript. In versions 5.0.39 and below, all HTTP request headers are stored in the session cookie, which is signed but not encrypted, exposing…
Vulnerability class: Information Disclosure
EPSS: 0.004 (27.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N.
Affected products
- Feathersjs Feathers — versions < 5.0.40
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Third Party Advisory)
- security-advisories@github.com (Patch, x_refsource_MISC)
- security-advisories@github.com (Product, x_refsource_MISC, Release Notes)
Frequently asked questions
- What is CVE-2026-27193?
- CVE-2026-27193 is a medium-severity vulnerability in Feathersjs Feathers, classified under Information Disclosure. CVSS score: 5.3/10. Published 2026-02-21.
- How severe is CVE-2026-27193?
- Medium severity. CVSS v3 base score is 5.3 out of 10.