Is CVE-2026-2880 actively exploited?

No active exploitation of CVE-2026-2880 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-2880 be exploited remotely?

Yes. CVE-2026-2880 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-2880?

CVE-2026-2880 has a CVSS score of 8.2 (HIGH).

HOME VULNERABILITIESCVE-2026-2880

HIGH

CVE-2026-2880

CWE-20Published: February 27, 2026· Updated: Mar 2, 2026

8.2

CVSS v3.1

EPSS:0.16%probability of exploitation in 30 daysPercentile:36.4th

Official Description

A vulnerability in @fastify/middie versions < 9.2.0 can result in authentication/authorization bypass when using path-scoped middleware (for example, app.use('/secret', auth)).

When Fastify router normalization options are enabled (such as ignoreDuplicateSlashes, useSemicolonDelimiter, and related trailing-slash behavior), crafted request paths may bypass middleware checks while still being routed to protected handlers.

NVD Source

Technical Analysis

CVE-2026-2880 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.

CVSS v3.1 Vector Breakdown

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges Req.None

User InteractionNone

ScopeX

Impact

Confidentiality

Integrity

Availability

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/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