Skip to content

CVE-2026-55848 — mapfish-print is a component of MapFish for printing templated cartographic maps.

Key facts

CVE-2026-55848 is a High (8.6) vulnerability: mapfish-print is a component of MapFish for printing templated cartographic maps.. This entry ships a detection-only PoC and a Docker test lab.
CVE CVE-2026-55848
Severity High (8.6)
Detection / prevention —
PoC poc.py
Source 2026/CVE-2026-55848/

Details

English | 한국어

Description

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 Details

Property Value
CVE ID CVE-2026-55848
Type SSRF
CVSS Score 8.6

Proof of Concept

Download

# Download PoC script
curl -O https://raw.githubusercontent.com/fankh/vulnerability-poc/main/2026/CVE-2026-55848/poc.py

Usage

# Run PoC against target
python3 poc.py --target <TARGET_URL>

# With authentication
python3 poc.py --target <TARGET_URL> --username <USER> --password <PASS>

⚠️ Warning: This PoC is for authorized security testing only. It uses detection-only techniques and does not exploit or damage target systems.

Test Lab

This repository includes a Docker-based test environment with both vulnerable and patched applications.

Quick Start

# Clone and navigate to CVE directory
cd CVE-2026-55848

# Start both applications
docker-compose up -d

# Run tests
./run-tests.sh    # Linux/Mac
./run-tests.ps1   # Windows PowerShell

Application Endpoints

Application URL Status
Vulnerable App http://localhost:8080 Shows vulnerability
Patched App http://localhost:8081 Demonstrates fix

Directory Structure

├── README.md           # English documentation
├── README_KO.md        # Korean documentation
├── poc.py              # PoC detection script
├── docker-compose.yml  # Container orchestration
├── run-tests.sh        # Linux/Mac test runner
├── run-tests.ps1       # Windows test runner
├── vulnerable-app/     # Vulnerable version
│   ├── app.py
│   ├── Dockerfile
│   └── requirements.txt
└── patched-app/        # Fixed version
    ├── app.py
    ├── Dockerfile
    └── requirements.txt

References

  • https://github.com/mapfish/mapfish-print/commit/13beae7a7f970fc3526c1f7ca5db817d8d51fbec
  • https://github.com/mapfish/mapfish-print/commit/23a96e7baa15077bdb0e5fc5a72b18da23af9121
  • https://github.com/mapfish/mapfish-print/commit/3525e8150fcb5f40095930ccf7aec0d8ce92bbcb
  • https://github.com/mapfish/mapfish-print/commit/56c47d3bf70d8428916dea8ed7005518ad07dc7d
  • https://github.com/mapfish/mapfish-print/commit/a55a24873db5f19b37abac7d59144dc86406c236
  • https://github.com/mapfish/mapfish-print/commit/d13911ac6e0509444d64e74830f10b14e4dcfdf1
  • https://github.com/mapfish/mapfish-print/pull/4212
  • https://github.com/mapfish/mapfish-print/pull/4215
  • https://github.com/mapfish/mapfish-print/pull/4216
  • https://github.com/mapfish/mapfish-print/pull/4217
  • https://github.com/mapfish/mapfish-print/pull/4219
  • https://github.com/mapfish/mapfish-print/pull/4221
  • https://github.com/mapfish/mapfish-print/releases/tag/3.28.30
  • https://github.com/mapfish/mapfish-print/releases/tag/3.30.32
  • https://github.com/mapfish/mapfish-print/releases/tag/3.31.24
  • https://github.com/mapfish/mapfish-print/releases/tag/4.0.5
  • https://github.com/mapfish/mapfish-print/security/advisories/GHSA-5v29-34h8-v68r

Generated by PoC Generator on 2026-08-29T18:05:25.377749315

Frequently asked questions

What is CVE-2026-55848?

CVE-2026-55848 is a High (8.6) vulnerability: mapfish-print is a component of MapFish for printing templated cartographic maps.. This entry ships a detection-only PoC and a Docker test lab.

How do I detect CVE-2026-55848?

Run the detection-only PoC included with this entry against your Docker test lab to confirm whether a target is affected; pair it with your own IDS logging.

How do I block or mitigate CVE-2026-55848?

Upgrade to a fixed version per the vendor advisory; the NVD record lists the affected versions. Use the included PoC to verify your remediation.

For authorized security testing and research only. See the full source and NVD record.