The (1) arq_updater, (2) arqcommitter, (3) standardrestorer, (4) arqglacierrestorer, and (5) arqs3glacierrestorer helper apps in Arq 5.x before 5.10 for Mac allow local users to gain root privileges via a crafted data packet.
Severity
CVSS 3.1
7.8 high
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS
1.0% chance of exploitation in the next 30 days; higher than 63% of CVEs (scores of 2026-10-31)