High 7.7Published Feb 24, 2026

CVE-2026-25891Fiber has an Arbitrary File Read in Static Middleware on Windows

Updated under an hour ago (Oct 28, 2026, 2:00 AM ET)

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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. A Path Traversal (CWE-22) vulnerability in Fiber allows a remote attacker to bypass the static middleware sanitizer and read arbitrary files on the server file system on Windows. This affects Fiber v3 through version 3.0.0. This has been patched in Fiber v3 version 3.1.0.

CVSS: 7.7 HIGH (v4.0, CNA)CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:P
Weakness (CWE): CWE-22
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Feb 24, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

gofiber fiber gofiber:fiber (from the name)	from 3.0.0, < 3.1.0	CNA record
gofiber fiber gofiber:fiber	from 3.0.0 before 3.1.0	NVD

References

References

https://github.com/gofiber/fiber/security/advisories/GHSA-m3c2-496v-cw3v	x-refsource-confirm, exploit, vendor-advisory
https://github.com/gofiber/fiber/pull/4064	x-refsource-misc, exploit, issue-tracking
https://github.com/gofiber/fiber/commit/59133702301c2ab7b776dd123b474cbd995f2c86	x-refsource-misc, patch

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.