CVE-2026-26061
published 2026-03-27CVE-2026-26061: Fleet is open source device management software. Prior to 4.81.0, Fleet contained multiple unauthenticated HTTP endpoints that read request bodies without…
PriorityP346high7.5CVSS 3.1
AVNACLPRNUINSUCNINAH
EPSS
0.43%
34.7th percentile
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
2 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| fleetdm | fleet | < 4.81.0 | 4.81.0 |
| github.com | fleetdm_fleet_v4 | >= 0 < 4.43.5-0.20260113202849-bbc1aef2987d | 4.43.5-0.20260113202849-bbc1aef2987d |
CVSS provenance
nvdv3.17.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
nvdv4.08.7HIGHCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
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OSV
Fleet's unbounded request body read allows remote Denial of Service in github.com/fleetdm/fleet
osv·2026-04-02
CVE-2026-26061 Fleet's unbounded request body read allows remote Denial of Service in github.com/fleetdm/fleet
Fleet's unbounded request body read allows remote Denial of Service in github.com/fleetdm/fleet
Fleet's unbounded request body read allows remote Denial of Service in github.com/fleetdm/fleet.
NOTE: The source advisory for this report contains additional versions that could not be automatically mapped to standard Go module versions.
(If this is causing false-positive reports from vulnerability scanners, please suggest an edit to the report.)
The additional affected modules and versions are: github.com/fleetdm/fleet/v4 before v4.43.5-0.20260113202849-bbc1aef2987d.
OSV
Fleet's unbounded request body read allows remote Denial of Service
osv·2026-03-27
CVE-2026-26061 [HIGH] Fleet's unbounded request body read allows remote Denial of Service
Fleet's unbounded request body read allows remote Denial of Service
### Summary
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.
### Impact
An unauthenticated attacker could cause the Fleet server process to exhaust available memory and restart by sending oversized or repeated HTTP requests to affected endpoints.
This vulnerability impacts **availability only**. There is:
- No exposure of sensitive data
- No authentication bypass
- No privilege escalation
- No integrity impact
### Workarounds
If upgrading immediately is not possible
GHSA
Fleet's unbounded request body read allows remote Denial of Service
ghsa·2026-03-27
CVE-2026-26061 [HIGH] CWE-770 Fleet's unbounded request body read allows remote Denial of Service
Fleet's unbounded request body read allows remote Denial of Service
### Summary
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.
### Impact
An unauthenticated attacker could cause the Fleet server process to exhaust available memory and restart by sending oversized or repeated HTTP requests to affected endpoints.
This vulnerability impacts **availability only**. There is:
- No exposure of sensitive data
- No authentication bypass
- No privilege escalation
- No integrity impact
### Workarounds
If upgrading immediately is not possible
No detection rules found.
No public exploits indexed.
2026-03-27
Published