CVE-2026-39921Network attack vector

Authenticated internal-resource access via remote document thumbnailing

Published Apr 10, 2026 · Updated Apr 10, 2026

SSRF in GeoNode 4.0 before 4.4.5 and 5.0 before 5.0.2 allows remote authenticated users to access internal resources via document uploads. The upload view sends a remote document's doc_url into thumbnail generation, causing the server to fetch it without private-address or redirect validation. Document-upload permission is required; requests can reach loopback, RFC1918, link-local, or cloud metadata endpoints and expose or modify reachable data.

CVSS severity6.3
Medium
EPSS probability0.22%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SSRF in GeoNode 4.0 before 4.4.5 and 5.0 before 5.0.2 allows remote authenticated users to access internal resources via document uploads. The upload view sends a remote document's doc_url into thumbnail generation, causing the server to fetch it without private-address or redirect validation. Document-upload permission is required; requests can reach loopback, RFC1918, link-local, or cloud metadata endpoints and expose or modify reachable data.

The record

CVE
CVE-2026-39921
Published
Apr 10, 2026
Updated
Apr 10, 2026
Vendor
GeoSolutions
Product
GeoNode
Classifications
CWE-918, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 10, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 10, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=4.0 <4.4.5
  2. Affected versionversion=5.0 <5.0.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

GeoSolutions · GeoNodeversion=4.0 <4.4.5; version=5.0 <5.0.2

Published CVSS scores

5.3VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:L/SI:L/SA:L
6.3NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-918Server-Side Request Forgery (SSRF)
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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