High severity8.6NVD Advisory· Published Jun 29, 2026· Updated Jul 14, 2026

CVE-2026-56285

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.

Affected products

Zedeus/nitterllm-fuzzy

Patches

Vulnerability mechanics

References

github.com/zedeus/nitter/commit/44b2f096f67da2cc257a0e262a94a7ae79e95d47nvd
github.com/zedeus/nitter/issues/1411nvd
www.vulncheck.com/advisories/nitter-server-side-request-forgery-in-video-media-proxy-endpointnvd

News mentions

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