h2 (pypi) has 2 known vulnerabilities, the worst rated MODERATE. Upgrade to 4.4.1 or later to clear all of them. No malicious-package signal is recorded.
No published models are known to use this package.
CVSS v3.1 base score out of 10
chance of exploitation in 30 days, 37th percentile of all CVEs
CyberXYZ composite out of 10
fig. 01 — GHSA-6hr6-w5qg-qmwg, the advisory selected below
h2 <=4.4.0 accepts request header blocks containing more than one Host header, and forwards every Host header to the consuming application.
Full advisory text at GitHub advisory or NVD.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
CyberXYZ does not call a package safe in absolute terms. It records 2 known vulnerabilities for h2 (pypi), the worst rated MODERATE, and no malicious-package signal. Whether it is acceptable depends on the version you run.
Yes. CyberXYZ records 2 known vulnerabilities for h2 (pypi), the worst rated MODERATE. They are GHSA-6hr6-w5qg-qmwg, GHSA-847f-9342-265h.
4.4.1 or later clears every advisory recorded for h2 (pypi). Check the release you pick before installing it.
Search h2 in CyberXYZ Check at https://cyberxyz.io/check?q=h2. The xyz Scanner checks a project's dependencies, and CyberXYZ Proxy checks each package as it is installed.
Checked 2026-11-14 at 12:27 UTC. The most recent advisory here was published 2026-08-06. Updated continuously from NVD, GHSA, OSV and CNA feeds.