Medium 5.3Published Jul 8, 2026

CVE-2026-44332Fiber is an Express inspired web framework written in Go.

Updated under an hour ago (2026-10-19 09:10 UTC)

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It affects gofiber fiber. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for gofiber fiber

Exploited in the last 30 days

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: 5.3 MEDIUM (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Weakness (CWE): CWE-203
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Not given
NVD analysis: Analyzed
Record last updated: Jul 15, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

gofiber fiber gofiber:fiber	before 3.3.0	NVD

References

https://github.com/gofiber/fiber/commit/c7ac00edd19f9669b1aebbec6e229658baaa059epatch
https://github.com/gofiber/fiber/pull/4245issue-tracking, patch
https://github.com/gofiber/fiber/releases/tag/v3.3.0release-notes
https://github.com/gofiber/fiber/security/advisories/GHSA-g5vh-55hw-rxm8exploit, vendor-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.