CVE intelligence

CVE-2026-86250

h3 versions before 2.0.1-rc.18 fail to validate the chunk count parsed from user-controlled cookie values in setChunkedCookie() and deleteCh

Published 2026-09-06 · CVSS

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

AVAttack Vector: Network
ACAttack Complexity: Low
ATAttack Requirements: None
PRPrivileges Required: None
UIUser Interaction: None
VCVulnerable System Confidentiality: None
VIVulnerable System Integrity: None
VAVulnerable System Availability: High
SCSubsequent System Confidentiality: None
SISubsequent System Integrity: None
SASubsequent System Availability: None

high