CVE-2026-56285

HIGH 8.6

Nitter - Server-Side Request Forgery in /video Media Proxy Endpoint

CVSS Score

8.6

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-918 CWE-1188
Vendor	zedeus
Product	nitter
Published	Jun 29, 2026
Last Updated	Jun 29, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

None

Availability

None

Affected Versions

zedeus / nitter

0 < 44b2f096f67da2cc257a0e262a94a7ae79e95d47

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/zedeus/nitter/issues/1411 github.com: https://github.com/zedeus/nitter/commit/44b2f096f67da2cc257a0e262a94a7ae79e95d47 vulncheck.com: https://www.vulncheck.com/advisories/nitter-server-side-request-forgery-in-video-media-proxy-endpoint

Credits

George Chen