TerriaJS terriajs-server up to 4.0.2 Configuration input validation

CVSS Meta Temp Score
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CTI Interest Score
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6.8$0-$5k0.00

Summaryinfo

A vulnerability was found in TerriaJS terriajs-server up to 4.0.2. It has been rated as critical. The impacted element is an unknown function of the component Configuration Handler. This manipulation causes input validation. This vulnerability appears as CVE-2026-27818. The attack may be initiated remotely. There is no available exploit. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in TerriaJS terriajs-server up to 4.0.2. It has been declared as critical. Affected by this vulnerability is an unknown function of the component Configuration Handler. The manipulation with an unknown input leads to a input validation vulnerability. The CWE definition for the vulnerability is CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. As an impact it is known to affect integrity, and availability. The summary by CVE is:

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.

The advisory is shared at github.com. This vulnerability is known as CVE-2026-27818 since 02/24/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Neither technical details nor an exploit are publicly available.

Upgrading to version 4.0.3 eliminates this vulnerability. Applying the patch 3aaa5d9717162b245ae4569232bbe7d8673c913f is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-8783). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Vendor

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Version

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 7.0
VulDB Meta Temp Score: 6.8

VulDB Base Score: 6.5
VulDB Temp Score: 6.2
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔒

CVSSv2info

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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Input validation
CWE: CWE-20
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: terriajs-server 4.0.3
Patch: 3aaa5d9717162b245ae4569232bbe7d8673c913f

Timelineinfo

02/24/2026 CVE reserved
02/26/2026 +2 days Advisory disclosed
02/26/2026 +0 days VulDB entry created
03/04/2026 +6 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: GHSA-w789-49fc-v8hr
Status: Confirmed

CVE: CVE-2026-27818 (🔒)
GCVE (CVE): GCVE-0-2026-27818
GCVE (VulDB): GCVE-100-347893
EUVD: 🔒

Entryinfo

Created: 02/26/2026 01:30
Updated: 03/04/2026 22:23
Changes: 02/26/2026 01:30 (69), 02/26/2026 04:59 (1), 03/04/2026 22:23 (12)
Complete: 🔍
Cache ID: 216::103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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