What’s Vulnerable › Vulnerabilities
CVE-2026-26061: Fleet's unbounded request body read allows remote Denial of Service
- Severity: high (CVSS 7.5 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.5% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-03-27 · updated 2026-10-26
- Weakness: CWE-770
Description
Fleet is open source device management software. Prior to 4.81.0, Fleet contained multiple unauthenticated HTTP endpoints that read request bodies without enforcing a size limit. An unauthenticated attacker could exploit this behavior by sending large or repeated HTTP payloads, causing excessive memory allocation and resulting in a denial-of-service (DoS) condition. Version 4.81.0 patches the issue.
Affected products
- fleetdm fleet: before 4.81.0 — fixed in 4.81.0
How to fix
Upgrade to a fixed version: fleetdm fleet 4.81.0. Check the vendor advisory for mitigations.
References
Get alerted when CVE-2026-26061 or the next vulnerability affects your stack