CVE-2026-111923 (CVSS 7.5)

Description

Fleet before 4.89.0 contains an unbounded recursion vulnerability in Apple MDM enrollment property list parsing that allows unauthenticated attackers to crash the server. Attackers can send a crafted binary plist payload of about 150 bytes to the enrollment endpoints, triggering exponential allocation or infinite recursion that exhausts CPU and memory.

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CVSS v3.1 Score

7.5

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness Type (CWE)

CWE-674 CWE-674

References

Other References

https://github.com/fleetdm/fleet/security/advisories/GHSA-x467-vgxf-2g6h https://www.vulncheck.com/advisories/fleet-before-4.89.0-unauthenticated-dos-via-apple-mdm-enrollment-plist-parsing

Frequently Asked Questions

What is CVE-2026-111923? +

Fleet before 4.89.0 contains an unbounded recursion vulnerability in Apple MDM enrollment property list parsing that allows unauthenticated attackers to crash the server. Attackers can send a crafted binary plist payload of about 150 bytes to the enrollment endpoints, triggering exponential allocation or infinite recursion that exhausts CPU and memory. It has a CVSS v3.1 base score of 7.5 (HIGH).

How severe is CVE-2026-111923? +

CVE-2026-111923 has a CVSS v3.1 score of 7.5 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

How do I check if I'm vulnerable to CVE-2026-111923? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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