What is CVE-2026-42544?

CVE-2026-42544 is a high-severity vulnerability in Emmett-framework Granian, classified under Improper Input Validation. CVSS score: 7.5/10. Published 2026-05-12.

How severe is CVE-2026-42544?

High severity. CVSS v3 base score is 7.5 out of 10.

Resource exhaustion in Emmett-framework Granian

CVE-2026-42544

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…

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

EPSS: 0.001 (24.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Emmett-framework Granian — versions >= 1.2.0, < 2.7.4

Weakness classification (CWE)

References

security-advisories@github.com (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-42544?: CVE-2026-42544 is a high-severity vulnerability in Emmett-framework Granian, classified under Improper Input Validation. CVSS score: 7.5/10. Published 2026-05-12.
How severe is CVE-2026-42544?: High severity. CVSS v3 base score is 7.5 out of 10.