Medium severity5.3NVD Advisory· Published Jul 8, 2026· Updated Jul 15, 2026
CVE-2026-44332
CVE-2026-44332
Description
Fiber is an Express inspired web framework written in Go. Prior to 3.3.0, the default Authorizer function in the BasicAuth middleware in middleware/basicauth/config.go uses short-circuit evaluation that skips password hash comparison for non-existent usernames, enabling reliable remote username enumeration through response timing differences. This issue is fixed in version 3.3.0.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
github.com/gofiber/fiber/v3Go | < 3.3.0 | 3.3.0 |
Affected products
3- osv-coordsRange: < 0.0.20260727T201416-160000.1.1
Patches
Vulnerability mechanics
References
5- github.com/gofiber/fiber/commit/c7ac00edd19f9669b1aebbec6e229658baaa059envdPatch
- github.com/gofiber/fiber/pull/4245nvdIssue TrackingPatch
- github.com/gofiber/fiber/security/advisories/GHSA-g5vh-55hw-rxm8nvdExploitVendor AdvisoryWEB
- github.com/advisories/GHSA-g5vh-55hw-rxm8ghsaADVISORY
- github.com/gofiber/fiber/releases/tag/v3.3.0nvdRelease Notes
News mentions
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