CVE-2025-66902

HIGH 7.5CVE-2025-66902 · Published 20/01/2026 · updated 17/06/2026

In short

CVE-2025-66902 is a HIGH (CVSS 7.5) vulnerability affecting websocket server (pithikos).
Chance of exploitation in the next 30 days (EPSS): 0.43%, higher than 37.7% of all vulnerabilities.
No patched version is listed yet: follow the vendor's advisory in References.

Package	Affected versions	Patched versions
websocket server pithikos	`= 0.6.4`	No fix yet

Description

An input validation issue in in Pithikos websocket-server v.0.6.4 allows a remote attacker to obtain sensitive information or cause unexpected server behavior via the websocket_server/websocket_server.py, WebSocketServer._message_received components.

References

cyberinvest211/websocket-server-vuln-poc · Exploit

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