Fleet Server Insertion of Sensitive Information into Log File
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- High · High · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-532.
Summary
An issue was discovered in Fleet Server >= v8.10.0 and < v8.10.3 where Agent enrolment tokens are being inserted into the Fleet Server’s log file in plain text. These enrolment tokens could allow someone to enrol an agent into an agent policy, and potentially use that to retrieve other secrets in the policy including for Elasticsearch and third-party services. Alternatively a threat actor could potentially enrol agents to the clusters and send arbitrary events to Elasticsearch.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
Remediation
- Fix · CNA Fleet Server (Elastic) Fixed in 8.10.3
Timeline
- 2026-10-02 Threatist record created from CVE-2023-46667
- 2026-10-03 Alias added: GHSA-wv9p-64pj-gq2g
- 2026-10-11 EPSS moved to the 50th–90th percentile
References
More Elastic Fleet Server vulnerabilities
- TI-2026-40526 Allocation of Resources Without Limits or Throttling in Fleet Server Leading to Denial of Service CVSS 3.1HIGH 7.5
- TI-2026-50895 Authorization Bypass Through User-Controlled Key in Fleet Server Leading to Information Disclosure CVSS 3.1MEDIUM 6.5
- TI-2026-54637 Incorrect Authorization in Fleet Server Leading to Denial of Service of Agent Upload Operations CVSS 3.1LOW 3.1
Sources
- CVE-2023-46667 · CVE Program
- CVE-2023-46667 · NVD
- FIRST EPSS
- GHSA-wv9p-64pj-gq2g · GitHub Advisory Database · CC BY 4.0
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