# CVE-2026-53983: Ground Station prior to 0.6.0 Unauthenticated Persistent Blind Server-Side Request Forgery via Orbital Data Source URL

> Unauthenticated attackers can trigger persistent SSRF via Socket.IO, enabling access to internal services and cloud metadata.

- **Severity:** Critical 9.2 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 6 Aug 2026
- **Updated:** 7 Aug 2026
- **Also known as:** GHSA-77cr-rrgg-p4wf

## What is CVE-2026-53983?

CVE-2026-53983 is a critical server-side request forgery vulnerability in Efstratios Goudelis Ground Station, published on 6 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Ground Station prior to 0.6.0 contains an unauthenticated blind server-side request forgery vulnerability in the orbital-source configuration path that allows any unauthenticated Socket.IO client to cause the ground-station process to issue outbound HTTP requests to attacker-chosen destinations. Attackers can connect to the Socket.IO server on port 7000 without credentials due to disabled authentication enforcement and a wildcard CORS policy, then submit a data_submission event with submit-orbital-sources action to persist an attacker-supplied URL in the database, then trigger an orbital sync via the equally unauthenticated background_task:start event. The URL is stored with no scheme allowlist, no host validation, and no rejection of loopback, RFC1918, or link-local (cloud instance metadata at 169.254.169.254) addresses, and is passed directly to requests.get in _fetch_http_3le and _fetch_http_omm in backend/tlesync/source_adapters.py. HTTP status codes and error messages from the outbound request are emitted in the orbital_sync_state Socket.IO event to all connected clients, providing a serviceable oracle for interpreting internal-service and cloud-metadata responses even though the raw response body is not directly leaked. Because the malicious source persists in the database across restarts and re-fires every 24 hours on the scheduled sync cycle, the primitive gives durable long-term SSRF without the attacker needing to remain connected.

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

## Which versions are affected by CVE-2026-53983?


## How do I fix CVE-2026-53983?

No fix has been published for CVE-2026-53983 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-53983 being exploited?

There is no known exploitation of CVE-2026-53983 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-53983 and fix it if it is affected.

What it is: CVE-2026-53983 is a critical server-side request forgery vulnerability in Efstratios Goudelis Ground Station, published on 6 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-53983 in the wild and no public exploit code.

Affected product: Efstratios Goudelis Ground Station. 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-2026-53983/ (Markdown: https://insights.sbomify.com/CVE-2026-53983/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-53983
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-53983
- OSV: https://osv.dev/vulnerability/CVE-2026-53983

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-53983/
Summaries are generated and may contain mistakes; the official description above is the record.