CVE-2026-55848: Mapfish Mapfish-Print

High severity, CVSS 8.6. EPSS: 0.5% chance of exploitation in the next 30 days.

mapfish-print is a component of MapFish for printing templated cartographic maps. Prior to 3.28.30, 3.30.32, 3.31.24, 3.33.16, and 4.0.5, MapFish Print accepts an attacker-controlled GML layer url in requests to the /api/print3/print endpoint and fetches XML parsed by core/src/main/java/org/mapfish/print/map/geotools/GmlLayer.java without disabling external entities and external DTDs. A remote XML document and DTD can expand a local file entity, and the resulting content can be exposed through the GML parsing and error path. This allows unauthenticated attackers to read files such as operating-system account data, Kubernetes service-account tokens, and certificates. Replacing the file entity target with an internal HTTP endpoint also permits server-side request forgery. This issue is fixed in versions 3.28.30, 3.30.32, 3.31.24, 3.33.16, and 4.0.5.

Affected products

• Mapfish Mapfish-Print: from 3.0.0, before 3.28.30 (fixed in 3.28.30); from 3.29.0, before 3.30.32 (fixed in 3.30.32); from 3.31.0, before 3.31.24 (fixed in 3.31.24); from 3.32.0, before 3.33.16 (fixed in 3.33.16); from 4.0.0, before 4.0.5 (fixed in 4.0.5)
• Mapfish Org.mapfish.print.print-Lib: from 3.0.0, before 3.28.30 (fixed in 3.28.30); from 3.29.0, before 3.30.32 (fixed in 3.30.32); from 3.31.0, before 3.31.24 (fixed in 3.31.24); from 3.32.0, before 3.33.16 (fixed in 3.33.16); from 4.0.0, before 4.0.5 (fixed in 4.0.5)
• Mapfish Org.mapfish.print.print-Servlet: from 3.0.0, before 3.28.30 (fixed in 3.28.30); from 3.29.0, before 3.30.32 (fixed in 3.30.32); from 3.31.0, before 3.31.24 (fixed in 3.31.24); from 3.32.0, before 3.33.16 (fixed in 3.33.16); from 4.0.0, before 4.0.5 (fixed in 4.0.5)

Published 2026-08-28. Last modified 2026-09-09.