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CVE-2026-54354

8.2 · HIGH

MapServer is a system for developing web-based GIS applications.

Published Sep 17, 2026CWE-89EPSS 0.68%

Overview

CVE-2026-54354 is a high-severity vulnerability. It was published on September 17, 2026 and has a CVSS 3.1 base score of 8.2 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.2, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

MapServer is a system for developing web-based GIS applications. Prior to 8.6.4, MapServer's PostGIS runtime filter translation in src/mappostgis.cpp and msPostGISLayerTranslateFilter() treats a filteritem as numeric when CONNECTIONTYPE POSTGIS and metadata such as gml_<item>_type=Integer are configured, but it does not verify that attacker-controlled CGI qstring or OGC API Features featureId input is a numeric literal. The unquoted input is concatenated into the generated PostgreSQL/PostGIS predicate, allowing an unauthenticated remote attacker with access to an affected query endpoint to bypass predicates, enumerate unintended records, perform boolean-based or time-based SQL injection, and increase database load. The issue does not by itself establish database modification capabilities. This issue is fixed in version 8.6.4.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/MapServer/MapServer/commit/65f1b53c258df2abdf6ce1f437c29e75e9976247GitHubgithub.com/MapServer/MapServer/commit/bd59d49779d2ecc64ca8dc1281c53231a50b698eGitHubgithub.com/MapServer/MapServer/pull/7516GitHubgithub.com/MapServer/MapServer/releases/tag/rel-8-6-4GitHubgithub.com/MapServer/MapServer/security/advisories/GHSA-xp29-8wp5-wc3pRefmapserver.org/development/changelog/changelog-8-6.html#changelog-8-6

How CyberStrike helps

Frequently asked questions

What is CVE-2026-54354?

CVE-2026-54354 is a high-severity vulnerability. It was published on September 17, 2026 and has a CVSS 3.1 base score of 8.2 (HIGH).

How severe is CVE-2026-54354?

This vulnerability has a CVSS 3.1 base score of 8.2, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-54354?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-54354?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-54354 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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