Auth bypass in Redpanda-Data Redpanda
CVE-2026-82266
Redpanda through 26.2.2 binds the Admin API to 0.0.0.0:9644 with admin_api_require_auth defaulting to false, treating unauthenticated requests as superusers. Attackers can reach port 9644 without credentials to create and delete broker accounts, modify cluster configuration, and disrupt partition replication.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.006 (48.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 48th percentile — 48.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.006 · change: +0.003
Affected products
Weakness classification (CWE)
References
- github.com/redpanda-data/redpanda/issues/30989 (issue-tracking)
- github.com/redpanda-data/redpanda (product)
- github.com/redpanda-data/redpanda/blob/3cfce474a872090e7c74d14181885f5838c54cf2… (technical-description)
- github.com/redpanda-data/redpanda/blob/3cfce474a872090e7c74d14181885f5838c54cf2… (technical-description)
- www.vulncheck.com/advisories/redpanda-admin-api-unauthenticated-superuser-acces… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-82266?
- CVE-2026-82266 is a critical-severity vulnerability in Redpanda-Data Redpanda, classified under Missing Authentication for Critical Function. CVSS score: 9.8/10. Published 2026-08-28.
- How severe is CVE-2026-82266?
- Critical severity. CVSS v3 base score is 9.8 out of 10.