Information Exposure Affecting hfs package, versions <3.2.1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-JS-HFS-17970332
- published14 Jul 2026
- disclosed13 Jul 2026
- creditZach Hanley
Introduced: 13 Jul 2026
NewCVE-2026-61503 (opens in a new tab)How to fix?
Upgrade hfs to version 3.2.1 or higher.
Overview
hfs is a HTTP File Server
Affected versions of this package are vulnerable to Information Exposure via differing responses in the loginSrp1 authentication handler in src/api.auth.ts. An attacker can confirm whether an account name exists, including the default admin account, by sending SRP step-1 login requests and comparing the endpoint’s response status and salt behavior for valid versus missing usernames. The login flow returns an immediate unauthorized response for unknown usernames while valid accounts proceed through SRP step 1, creating an observable difference without authentication. This lets a remote unauthenticated attacker probe usernames and then use the confirmed names to support password-guessing and session-forgery attacks.