Security Advisory

CVE-2026-86250

CVE vulnerability detail - eXtreme Datacenter Security Operations

Published 2026-09-06 12:00:26

Last updated 2026-09-06 12:00:26

Assigner VulnCheck

CVSS score 8.7

State PUBLISHED

Description

h3 versions before 2.0.1-rc.18 fail to validate the chunk count parsed from user-controlled cookie values in setChunkedCookie() and deleteChunkedCookie() functions. Attackers can send a crafted cookie header with an extremely large chunk count to trigger an O(n²) cleanup loop that hangs the server process.

← Browse all CVEs View on cve.org ↗