CVE-2026-82266

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreHIGH confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-08-28. a secondary CVSS source baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.8Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
9.8
EG Score
9.8(high)
EG Risk
49(Track)
EG Risk 49/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity98% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
26%
KEV
Not listed

Published

August 28, 2026

Last Modified

August 28, 2026

Advisory Details (5)

Auto-updated Aug 28, 2026
No patch confirmed yet. Sources: github.
generic

Redpanda Admin API Unauthenticated Superuser Access via Default Configuration | Advisories | VulnCheck

https://www.vulncheck.com/advisories/redpanda-admin-api-unauthenticated-superuser-access-via-default-configuration
generic

Unauthenticated Admin API Access in Default Configuration · Issue #30989 · redpanda-data/redpanda · GitHub

https://github.com/redpanda-data/redpanda/issues/30989
github

redpanda/src/v/security/request_auth.cc at 3cfce474a872090e7c74d14181885f5838c54cf2 · redpanda-data/redpanda · GitHub

https://github.com/redpanda-data/redpanda/blob/3cfce474a872090e7c74d14181885f5838c54cf2/src/v/security/request_auth.cc
generic

redpanda/conf/redpanda.yaml at 3cfce474a872090e7c74d14181885f5838c54cf2 · redpanda-data/redpanda · GitHub

https://github.com/redpanda-data/redpanda/blob/3cfce474a872090e7c74d14181885f5838c54cf2/conf/redpanda.yaml
generic

GitHub - redpanda-data/redpanda: Redpanda is a streaming data platform for developers. Kafka API compatible. 10x faster. No ZooKeeper. No JVM! · GitHub

https://github.com/redpanda-data/redpanda

Vendor Advisories for CVE-2026-82266(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 14× in last 7d / 14× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-08-30 04:14 UTCEG score recompute
  2. 2026-08-30 04:14 UTCGHSA enrichment
  3. 2026-08-30 01:22 UTCEPSS rescore
  4. 2026-08-30 00:17 UTCGHSA enrichment
  5. 2026-08-29 20:21 UTCGHSA enrichment
  6. 2026-08-29 16:23 UTCGHSA enrichment
  7. 2026-08-29 12:23 UTCGHSA enrichment
  8. 2026-08-29 08:20 UTCGHSA enrichment
  9. 2026-08-29 04:23 UTCGHSA enrichment
  10. 2026-08-29 00:24 UTCEG score recompute
  11. 2026-08-29 00:24 UTCGHSA enrichment
  12. 2026-08-28 20:26 UTCEG score recompute
  13. 2026-08-28 19:40 UTCEG score recompute
  14. 2026-08-28 19:36 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-82266?
CVE-2026-82266 is a critical vulnerability published on August 28, 2026. Redpanda through 26.2.2 binds the Admin API to 0.0.0.0:9644 with adminapirequire_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…
When was CVE-2026-82266 disclosed?
CVE-2026-82266 was first published in the National Vulnerability Database on August 28, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-82266 actively exploited?
CVE-2026-82266 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 73.8% of all scored CVEs.
What is the CVSS score of CVE-2026-82266?
CVE-2026-82266 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-82266?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-82266, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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