CVE-2026-101047: Fleet before 4.87.0 Unauthenticated iOS App Download via Predictable URLs

Severity: medium (CVSS 5.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-09-27 · updated 2026-10-07
Weakness: CWE-862

Description

Fleet before 4.87.0 does not protect the two endpoints that serve in-house iOS application packages and manifests (enterprise tier only) with the intended random, time-limited URL token. Because Apple's InstallEnterpriseApplication MDM command requires these URLs to be reachable without a Fleet session, they cannot rely on session-based authentication, and the missing token allows an unauthenticated attacker with network access to the Fleet server to download in-house IPA binaries and their metadata (bundle identifier, version, and name) by guessing sequential title identifiers. The impact is limited to read-only disclosure; there is no privilege escalation or write access, and the free tier is unaffected (it returns fleet.ErrMissingLicense).

Affected products

fleetdm fleet: before 4.87.0 — fixed in 4.87.0

How to fix

Upgrade to a fixed version: fleetdm fleet 4.87.0. Check the vendor advisory for mitigations.

References

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