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CVE-2026-55864— GeoNetwork: Unauthenticaded Server-Side Request Forgery in SLD Tool

Quick assessment

Affected
geonetwork core-geonetwork
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

GeoNetwork 是一个用于管理空间引用资源（spatially referenced resources）的目录应用程序。 在 4.2.17 和 4.4.12 之前的版本中， 接口会接受调用方提供的 WMS 服务器 URL，并在服务端发起 HTTP GET 请求，且未对目标地址进行验证。这使得匿名攻击者能够诱导 GeoNetwork 服务器向那些无法从外部直接访问的内部主机发送请求。 当返回的响应内容为 XML 时，该接口还会存储并返回所获取的响应体，从而使请求伪造成为“非盲”（non-blind）状态。这一

CVSS 7.8 · High
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I. Basic Information for CVE-2026-55864

Vulnerability Information
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Vulnerability Title
GeoNetwork: Unauthenticaded Server-Side Request Forgery in SLD Tool
Source: CVE Program / CVE List V5
Vulnerability Description
GeoNetwork is a catalog application to manage spatially referenced resources. Prior to 4.2.17 and 4.4.12, POST /api/tools/ogc/sld accepted a caller-supplied WMS server URL and performed a server-side HTTP GET without destination validation. An anonymous attacker could make the GeoNetwork server send requests to internal hosts that are not publicly reachable. When the outbound response was XML, the endpoint could store and return the fetched body, making the request forgery non-blind and enabling internal data disclosure, authorization bypass, and network reconnaissance. This issue is fixed in versions 4.2.17 and 4.4.12.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:L/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
服务端请求伪造(SSRF)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
geonetwork core-geonetwork >= 4.0.0, < 4.2.17 -

II. Public POCs for CVE-2026-55864

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III. Intelligence Information for CVE-2026-55864

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Patches & Fixes for CVE-2026-55864 (2)

Vendor Advisories for CVE-2026-55864 (1)

Vendor Pages for CVE-2026-55864 (2)

IV. Related Vulnerabilities

Same product: core-geonetwork
Same vendor: geonetwork
Same weakness: CWE-918

V. Comments for CVE-2026-55864

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