CVE-2026-56285 — Nitter - Server-Side Request Forgery in /video Media Proxy Endpoint
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…
Published: 2026-06-29 · CVSS: 7.7 · CVSS 4.0
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7