CVE-2026-27818

HIGH
2026-02-26 [email protected] GHSA-w789-49fc-v8hr
7.5
CVSS 3.1
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CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
None

Lifecycle Timeline

3
Analysis Generated
Mar 12, 2026 - 21:55 vuln.today
Patch Released
Mar 04, 2026 - 21:12 nvd
Patch available
CVE Published
Feb 26, 2026 - 00:16 nvd
HIGH 7.5

Tags

Node.js Terriajs Server

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.

Analysis

Improper input validation in TerriaJS-Server versions before 4.0.3 allows unauthenticated remote attackers to bypass domain allowlist restrictions and proxy requests to arbitrary domains. This vulnerability affects Node.js deployments of TerriaJS and could enable attackers to access restricted resources or perform server-side request forgery attacks. …

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Remediation

Within 24 hours: Identify all systems running TerriaJS-Server and document current versions. Within 7 days: Apply vendor patch to upgrade to version 4.0.3 or later across all affected instances; test in staging environment first. …

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Priority Score

38
Low Medium High Critical
KEV: 0
EPSS: +0.1
CVSS: +38
POC: 0

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CVE-2026-27818 vulnerability details – vuln.today
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