CVE-2021-21296 json
Denial-of-service in Fleet
published 2021-02-10 5 y ago modified 2026-10-06 34 d ago also EUVD-2021-8657
- cvss
- 2.7
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 2.0%
- EPSS 2.0% chance of exploitation in 30 days, percentile 81%
- public exploits
- 0
- none known
Summary
Fleet is an open source osquery manager. In Fleet before version 3.7.0 a malicious actor with a valid node key can send a badly formatted request that causes the Fleet server to exit, resulting in denial of service. This is possible only while a live query is currently ongoing. We believe the impact of this vulnerability to be low given the requirement that the actor has a valid node key. There is no information disclosure, privilege escalation, or code execution. The issue is fixed in Fleet 3.7.0.
Patch / fix
Exploit prediction
2.02% chance of exploitation in the next 30 days, higher than 81% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 2.7 | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:L |
| NVD | 3.1 | 2.7 | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:L |
| NVD | 2.0 | 4.0 | AV:N/AC:L/Au:S/C:N/I:N/A:P |
Affected products
- fleetdm fleet
Classification
- Weakness
-
- CWE-400 Uncontrolled Resource Consumption
References
-
github.com
/fleetdm/fleet/commit/f68f4238e83b45b2164e4ed05df14af0f06eaf40
patch, third-party-advisory
-
github.com
/fleetdm/fleet/security/advisories/GHSA-xwh8-9p3f-3x45
third-party-advisory
-
npmjs.com
/package/fleetctl
product, third-party-advisory
Sources
- CVE List CVE-2021-21296
- NVD CVE-2021-21296
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