XXE in Mapfish Mapfish-Print
CVE-2026-55848
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.
Vulnerability class: XXE (XML External Entity)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.6 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.005 (43.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 43rd percentile — 43.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.005 · change: +0.002
Affected products
- Mapfish Mapfish-Print — versions >= 3.0.0, < 3.28.30, >= 3.29.0, < 3.30.32, >= 3.31.0, < 3.31.24
- Mapfish Org.mapfish.print.print-Lib — versions >= 3.0.0, < 3.28.30, >= 3.29.0, < 3.30.32, >= 3.31.0, < 3.31.24
- Mapfish Org.mapfish.print.print-Servlet — versions >= 3.0.0, < 3.28.30, >= 3.29.0, < 3.30.32, >= 3.31.0, < 3.31.24
Weakness classification (CWE)
References
- github.com/mapfish/mapfish-print/security/advisories/GHSA-5v29-34h8-v68r
- github.com/mapfish/mapfish-print/pull/4212
- github.com/mapfish/mapfish-print/pull/4215
- github.com/mapfish/mapfish-print/pull/4216
- github.com/mapfish/mapfish-print/pull/4217
- github.com/mapfish/mapfish-print/pull/4219
- github.com/mapfish/mapfish-print/pull/4221
- github.com/mapfish/mapfish-print/commit/13beae7a7f970fc3526c1f7ca5db817d8d51fbec
- github.com/mapfish/mapfish-print/commit/23a96e7baa15077bdb0e5fc5a72b18da23af9121
- github.com/mapfish/mapfish-print/commit/3525e8150fcb5f40095930ccf7aec0d8ce92bbcb
Frequently asked questions
- What is CVE-2026-55848?
- CVE-2026-55848 is a high-severity vulnerability in Mapfish Mapfish-Print, classified under Improper Restriction of XML External Entity Reference (XXE). CVSS score: 8.6/10. Published 2026-08-28.
- How severe is CVE-2026-55848?
- High severity. CVSS v3 base score is 8.6 out of 10.