CVE-2026-63219: Unauthenticated file upload via missing authorization on formatter upload endpoint
- Is it exploited?
Reported, not confirmed by CISA. VulnCheck KEV lists it as exploited in the wild. CISA has not added it to its Known Exploited Vulnerabilities catalog as of .
VulnCheck KEV lists it since . It cites 1 public report, the first from .
- How likely is exploitation in the next 30 days?
- 0.5%
EPSS score, percentile 40.3 of all scored records. A probability estimated by FIRST, not a report of exploitation.
- How severe?
- 8.6 High
CVSS v3.1 base score, given by the CNA
- What should I do?
CISA has set no required action, because the vulnerability is not in KEV.
The CVE record links no vendor advisory, patch or mitigation.
- Which versions are affected?
Affected
- >= 4.3.0, < 4.4.12
- < 4.2.17
Source: CISA KEV 2026.10.29, as of ; VulnCheck KEV, as of ; FIRST EPSS, as of ; CVE List, as of . About the data.
Description
Unauthenticated file upload via missing authorization on formatter upload endpoint
GeoNetwork is a catalog application to manage spatially referenced resources. Prior to versions 4.4.12 and 4.2.17, the API endpoint for creating a new formatter via file upload is unprotected and allows the upload of external uncontrolled files. An unauthenticated attacker can upload arbitrary `.xsl` or `.zip` formatter files to the server. An unauthenticated attacker can write arbitrary files into the GeoNetwork formatter directory. On its own this constitutes unauthorized write access to server storage. The issue is patched in GeoNetwork versions 4.4.12 and 4.2.17.
Source: CVE List, as of . About the data.
What to do
Advisories and patches
The CVE record links no vendor advisory, patch or mitigation.
This summary is based on the CVE record as of . Check the vendor's advisory before you act: affected versions and fixes can change.
Affected products and versions
Versions by product, as listed in the CVE record (1 product)
| Status | Versions |
|---|---|
| Affected | >= 4.3.0, < 4.4.12 |
| Affected | < 4.2.17 |
Source: CVE List, as of . About the data.
Weakness
CWE-862
- CWE-862: Missing Authorization
CWE and CAPEC are maintained by MITRE; the entries are those named in the CVE record.
Timeline
| Date | Event |
|---|---|
| CVE record published |
References
5
- https://github.com/geonetwork/core-geonetwork/security/advisories/GHSA-mh22-prqr-vf42
- https://github.com/geonetwork/core-geonetwork/pull/9346
- https://docs.geonetwork-opensource.org/4.2/overview/change-log/version-4.2.17
- https://docs.geonetwork-opensource.org/4.4/overview/change-log/version-4.4.12
- https://thehackernews.com/2026/09/geonetwork-fixes-unauthenticated-rce.html