A deserialization of untrusted data vulnerability was found in ManageIQ. The YamlLoadAliases module overrides YAML.safe_load to silently fall back to YAML.unsafe_load in production when a Psych::DisallowedClass error occurs. An authenticated attacker with dialog import access can exploit this to achieve remote code execution by uploading a crafted YAML payload that triggers the fallback and deserializes arbitrary Ruby objects.

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Tue, 09 Jun 2026 14:30:00 +0000

Type Values Removed Values Added
First Time appeared Manageiq
Manageiq manageiq
Vendors & Products Manageiq
Manageiq manageiq

Tue, 09 Jun 2026 12:15:00 +0000

Type Values Removed Values Added
Description A deserialization of untrusted data vulnerability was found in ManageIQ. The YamlLoadAliases module overrides YAML.safe_load to silently fall back to YAML.unsafe_load in production when a Psych::DisallowedClass error occurs. An authenticated attacker with dialog import access can exploit this to achieve remote code execution by uploading a crafted YAML payload that triggers the fallback and deserializes arbitrary Ruby objects.
Title manageiq: YAML safe_load production fallback to unsafe_load enables RCE via deserialization
Weaknesses CWE-502
References
Metrics threat_severity

None

cvssV3_1

{'score': 8.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'}

threat_severity

Important


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cve-icon MITRE

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cve-icon Vulnrichment

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cve-icon NVD

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cve-icon Redhat

Severity : Important

Publid Date: 2026-06-09T07:23:47Z

Links: CVE-2026-52903 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-06-09T14:30:07Z

Weaknesses