CVE-2026-25891
Last modified
CVE-2026-25891 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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. EPSS estimates a 0.62% chance of exploitation in the next 30 days.
Description
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Gofiber | Fiber | >= 3.0.0, < 3.1.0 |
References
- https://github.com/gofiber/fiber/pull/4064Exploit, Issue Tracking
- https://github.com/gofiber/fiber/security/advisories/GHSA-m3c2-496v-cw3vExploit, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is CVE-2026-25891?
How severe is CVE-2026-25891?
How do I fix CVE-2026-25891?
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2026
- CVE-2026-25885PolarLearn is a free and open-source learning program. In 0-…7.5
- CVE-2026-25887Chartbrew is an open-source web application that can connect…7.2
- CVE-2026-25888Chartbrew is an open-source web application that can connect…8.8
- CVE-2026-25889File Browser provides a file managing interface within a spe…5.4
- CVE-2026-2589The Greenshift – animation and page builder blocks plugin fo…5.3
- CVE-2026-25890File Browser provides a file managing interface within a spe…8.1
- CVE-2026-25892Adminer is open-source database management software. Adminer…7.5
- CVE-2026-25893FUXA is a web-based Process Visualization (SCADA/HMI/Dashboa…9.8
- CVE-2026-25894FUXA is a web-based Process Visualization (SCADA/HMI/Dashboa…9.8
- CVE-2026-25895FUXA is a web-based Process Visualization (SCADA/HMI/Dashboa…9.8
- CVE-2026-25896fast-xml-parser allows users to validate XML, parse XML to J…9.3
- CVE-2026-25897ImageMagick is free and open-source software used for editin…9.8
Are you affected by CVE-2026-25891?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST