# CVE-2026-56285: Nitter - Server-Side Request Forgery in /video Media Proxy Endpoint

> Unauthenticated attackers can exploit SSRF in Nitter's video proxy to access internal resources and cloud metadata due to missing URL validation and hardcoded keys.

- **Severity:** High 7.7 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/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:** 29 Jun 2026
- **Updated:** 14 Jul 2026
- **Also known as:** GHSA-4m2j-2x3w-gg93

## What is CVE-2026-56285?

CVE-2026-56285 is a high-severity server-side request forgery vulnerability in zedeus nitter, published on 29 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Nitter's /video media proxy endpoint fails to validate target URLs against Twitter/X domains and uses a hardcoded default HMAC key, allowing unauthenticated attackers to compute valid HMACs for arbitrary URLs. Attackers can retrieve HTTP responses from any host reachable by the server, including cloud metadata services and internal network resources.

Weakness: CWE-918 (Server-Side Request Forgery), CWE-1188 (Initialization of a Resource with an Insecure Default)

## Which versions are affected by CVE-2026-56285?


## How do I fix CVE-2026-56285?

No fix has been published for CVE-2026-56285 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-56285 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-56285 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-56285 and fix it if it is affected.

What it is: CVE-2026-56285 is a high-severity server-side request forgery vulnerability in zedeus nitter, published on 29 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-56285 exists.

Affected product: zedeus nitter. 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-2026-56285/ (Markdown: https://insights.sbomify.com/CVE-2026-56285/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-56285
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-56285
- OSV: https://osv.dev/vulnerability/CVE-2026-56285

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-56285/
Summaries are generated and may contain mistakes; the official description above is the record.