CVE-2026-42544

HIGH SEVERITY

CVSS Score & Metrics

Base Score

7.5 / 10

Vector String

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

Vulnerability Description

Granian is a Rust HTTP server for Python applications. From 1.2.0 to 2.7.4, Granian aborts a worker process when an unauthenticated client sends a WebSocket upgrade request whose Sec-WebSocket-Protocol header contains non-ASCII bytes. The crash happens in Granian's WebSocket scope construction path, before the ASGI application is invoked. This vulnerability is fixed in 2.7.4.

Vulnerability Details

Published Date

May 06, 2026

Last Modified

May 18, 2026

CWE ID

CWE-20

Source

GitHub

Vendor

pip

Product

granian

External References

https://github.com/emmett-framework/granian/security/advisories/GHSA-vrg7-482j-p6f6
https://github.com/advisories/GHSA-vrg7-482j-p6f6

CVE-2026-42544

CVSS Score & Metrics

Vulnerability Description

Vulnerability Details

External References

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