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.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
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.
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.
Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.
Is CVE-2026-56285 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-56285 exists.
Sources
Also known as GHSA-4m2j-2x3w-gg93.