Is CVE-2026-39921 actively exploited?

A proof-of-concept exploit is publicly available for CVE-2026-39921, but active exploitation has not been confirmed.

Can CVE-2026-39921 be exploited remotely?

Yes. CVE-2026-39921 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-39921?

CVE-2026-39921 has a CVSS score of 6.3 (MEDIUM).

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MEDIUMPOC

CVE-2026-39921

CWE-918Published: April 10, 2026· Updated: Apr 16, 2026

6.3

CVSS v3.1

Official Description

GeoNode versions 4.0 before 4.4.5 and 5.0 before 5.0.2 contain a server-side request forgery vulnerability that allows authenticated users with document upload permissions to trigger arbitrary outbound HTTP requests by providing a malicious URL via the doc_url parameter during document upload. Attackers can supply URLs pointing to internal network targets, loopback addresses, RFC1918 addresses, or cloud metadata services to cause the server to make requests to internal resources without SSRF mitigations such as private IP filtering or redirect validation.

NVD Source

Technical Analysis

CVE-2026-39921 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A proof-of-concept (PoC) exploit exists for CVE-2026-39921. While not yet confirmed in active campaigns, the availability of PoC code increases exploitation risk substantially.