CVE-2026-44332

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.

CVSS v3 5.3 MEDIUM

5.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 3.9 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/gofiber/fiber/commit/c7ac00edd19f9669b1aebbec6e229658baaa059e	Patch
https://github.com/gofiber/fiber/pull/4245	Issue Tracking Patch
https://github.com/gofiber/fiber/releases/tag/v3.3.0	Release Notes
https://github.com/gofiber/fiber/security/advisories/GHSA-g5vh-55hw-rxm8	Exploit Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:gofiber:fiber:*:*:*:*:*:go:*:*

History

No history.

Information

Published : 2026-07-08 20:16

Updated : 2026-07-15 20:52

NVD link : CVE-2026-44332

Mitre link : CVE-2026-44332

CVE.ORG link : CVE-2026-44332

JSON object : View

Products Affected

gofiber

fiber

CWE

CWE-203

Observable Discrepancy

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