Timing Attack Affecting github.com/filebrowser/filebrowser/v2/auth package, versions <2.55.0
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
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-GOLANG-GITHUBCOMFILEBROWSERFILEBROWSERV2AUTH-15046549
- published26 Jan 2026
- disclosed21 Jan 2026
- creditGUCHI
Introduced: 21 Jan 2026
NewCVE-2026-23849 Â (opens in a new tab)How to fix?
Upgrade github.com/filebrowser/filebrowser/v2/auth to version 2.55.0 or higher.
Overview
Affected versions of this package are vulnerable to Timing Attack via the JSONAuth.Auth function. An unauthenticated attacker can determine valid usernames by measuring the response time of the /api/login endpoint, exploiting the timing discrepancy between valid and invalid username checks.