CVE-2026-86590: CWE-918 Server-Side request forgery (SSRF) in Eclipse Foundation Eclipse Che
Description
In Eclipse Che versions 7.79.0 through 7.121.0, the dashboard backend's POST /dashboard/api/data/resolver endpoint passes a caller-supplied URL directly to an outbound HTTP GET request with no host filtering. An authenticated user can exploit this server-side request forgery (SSRF) to read responses from internal network addresses, including the cloud instance metadata service (169.254.169.254), loopback interfaces, RFC-1918 private ranges, and in-cluster Kubernetes services. The operator-configured allowlist (spec.devEnvironments.allowedSources.urls) is not consulted. The vulnerability is fixed in version 7.122.0, which adds private-address blocking, IPv4-mapped IPv6 bypass prevention, operator allowlist enforcement, and disables HTTP redirects on the outbound request.
CVSS v4.0
Score 6.3medium
Affected software
Eclipse Foundation
Eclipse Che
pkg:github/eclipse-che/che-dashboardRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-86590 is a server-side request forgery (SSRF) vulnerability in Eclipse Che versions 7.79.0 through 7.121.0. The dashboard backend's POST /dashboard/api/data/resolver endpoint accepts a user-supplied URL and performs an outbound HTTP GET request without validating or filtering the host. This allows an authenticated user to read responses from internal network addresses such as cloud instance metadata services (169.254.169.254), loopback interfaces, RFC-1918 private IP ranges, and Kubernetes in-cluster services. The operator-configured allowlist is not enforced. The vulnerability is addressed in version 7.122.0 with multiple mitigations including private address blocking and allowlist enforcement.
Potential Impact
An authenticated user can exploit this SSRF vulnerability to access internal network resources that are normally inaccessible externally. This includes sensitive metadata services and internal Kubernetes services, potentially leading to information disclosure within the internal network environment. The vulnerability does not require user interaction and has a medium severity rating (CVSS 6.3). There are no known exploits in the wild at this time.
Mitigation Recommendations
Upgrade Eclipse Che to version 7.122.0 or later, where this vulnerability is fixed by implementing private address blocking, IPv4-mapped IPv6 bypass prevention, enforcement of the operator allowlist, and disabling HTTP redirects on the outbound request. No other mitigations are indicated. Patch status is confirmed fixed in 7.122.0.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- eclipse
- Date Reserved
- 2026-09-08T07:20:53.477Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6a9fd766acd9273b49698aa9
Added to database: 09/08/2026, 09:37:42 UTC
Last enriched: 09/08/2026, 09:52:40 UTC
Last updated: 10/22/2026, 01:15:26 UTC
Views: 120
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