Is CVE-2026-27818 actively exploited?

No active exploitation of CVE-2026-27818 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-27818 be exploited remotely?

Yes. CVE-2026-27818 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-27818?

CVE-2026-27818 has a CVSS score of 7.5 (HIGH) and an EPSS exploitation probability of 0.08%.

HOME VULNERABILITIESCVE-2026-27818

HIGH

CVE-2026-27818

CWE-20Published: February 26, 2026· Updated: Mar 4, 2026

7.5

CVSS v3.1

EPSS:0.08%probability of exploitation in 30 daysPercentile:24.1th

Official Description

TerriaJS-Server is a NodeJS Express server for TerriaJS, a library for building web-based geospatial data explorers. A validation bug in versions prior to 4.0.3 allows an attacker to proxy domains not explicitly allowed in the `proxyableDomains` configuration. Version 4.0.3 fixes the issue.

NVD Source

Technical Analysis

CVE-2026-27818 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 full integrity compromise (data manipulation), with a CVSS base score of 7.5.