High (8.8) in kubernetes aws-iam-authenticator. EPSS 1.1% chance of exploitation in the next 30 days. Fixed in sigs.k8s.io/aws-iam-authenticator 0.5.9.
A security issue was discovered in aws-iam-authenticator where an allow-listed IAM identity may be able to modify their username and escalate privileges.
Severity
CVSS 3.1
8.8 high
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS
1.1% chance of exploitation in the next 30 days; higher than 65% of CVEs (scores of 2026-10-31)