Is CVE-2026-25891 actively exploited?

No active exploitation of CVE-2026-25891 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-25891 be exploited remotely?

Yes. CVE-2026-25891 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-25891?

CVE-2026-25891 has a CVSS score of 7.5 (HIGH) and an EPSS exploitation probability of 0.03%.

HOME VULNERABILITIESCVE-2026-25891

HIGH

CVE-2026-25891

CWE-22Published: February 24, 2026· Updated: Feb 27, 2026

7.5

CVSS v3.1

EPSS:0.03%probability of exploitation in 30 daysPercentile:10.0th

Official 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.

NVD Source

Technical Analysis

CVE-2026-25891 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), with a CVSS base score of 7.5.