Is CVE-2026-78587 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-78587?

CVE-2026-78587 has a CVSS v3 severity of LOW (3.1).

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CVE-2026-78587

Description

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.