Is CVE-2026-44573 actively exploited?

No active exploitation of CVE-2026-44573 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-44573 be exploited remotely?

Yes. CVE-2026-44573 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-44573?

CVE-2026-44573 has a CVSS score of 7.5 (HIGH).

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HIGH

CVE-2026-44573

CWE-863Published: May 13, 2026· Updated: May 14, 2026

7.5

CVSS v3.1

EPSS:0.04%probability of exploitation in 30 daysPercentile:11.3th

Official Description

Next.js is a React framework for building full-stack web applications. From 12.2.0 to before 15.5.16 and 16.2.5, Applications using the Pages Router with i18n configured and middleware/proxy-based authorization can allow unauthorized access to protected page data through locale-less /_next/data/<buildId>/<page>.json requests. In affected configurations, middleware does not run for the unprefixed data route, allowing an attacker to retrieve SSR JSON for protected pages without passing the intended authorization checks. This vulnerability is fixed in 15.5.16 and 16.2.5.

NVD Source

Technical Analysis

CVE-2026-44573 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.