CVE-2026-78587: low-severity vulnerability in Elastic Fleet Server
Incorrect Authorization in Fleet Server Leading to Denial of Service of Agent Upload Operations
Published
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
8Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 3.1epss 0.3%
Incorrect Authorization (CWE-863) in Fleet Server can lead to a denial of service of agent upload operations via Privilege Abuse (CAPEC-122). Fleet Server does not correctly verify session ownership during multi-part data upload operations, allowing any authenticated agent to interfere with the active upload sessions belonging to other enrolled agents.
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L
Affected products
Elastic · Fleet ServerRelated CVEs — Elastic Fleet Server
In the same product, most dangerous first.
CVE-2023-46667HIGHFleet Server Insertion of Sensitive Information into Log FileEPSS 0.7%CVE-2026-72676MEDIUMImproper Control of Generation of Code in Fleet Server Leading to Code InjectionEPSS 0.5%CVE-2026-56150MEDIUMAllocation of Resources Without Limits or Throttling in Fleet Server Leading to Denial of ServiceEPSS 0.5%CVE-2026-72657MEDIUMAuthorization Bypass Through User-Controlled Key in Fleet Server Leading to Information DisclosureEPSS 0.4%CVE-2023-31421MEDIUMBeats, Elastic Agent, APM Server, and Fleet Server Improper Certificate Validation issueEPSS 0.3%CVE-2024-52975CRITICALFleet Server sensitive information exposure via logsEPSS 0.3%