# CVE-2026-86590: Server-side request forgery in Eclipse Che

> Authenticated users can exploit an SSRF vulnerability in Eclipse Che to read internal network resources and cloud metadata, bypassing security controls.

- **Severity:** Medium 6.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 8 Sep 2026
- **Updated:** 8 Sep 2026
- **Also known as:** GHSA-7c8p-h44p-ww4q

## What is CVE-2026-86590?

CVE-2026-86590 is a medium-severity server-side request forgery vulnerability in Eclipse Che, published on 8 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official 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.

Weakness: CWE-918 (Server-Side Request Forgery)

## Which versions are affected by CVE-2026-86590?


## How do I fix CVE-2026-86590?

No fix has been published for CVE-2026-86590 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-86590 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-86590 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-86590 and fix it if it is affected.

What it is: CVE-2026-86590 is a medium-severity server-side request forgery vulnerability in Eclipse Che, published on 8 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-86590 exists.

Affected product: Eclipse Che. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-86590/ (Markdown: https://insights.sbomify.com/CVE-2026-86590/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-86590
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-86590
- OSV: https://osv.dev/vulnerability/CVE-2026-86590

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-86590/
Summaries are generated and may contain mistakes; the official description above is the record.