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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History
Tue, 09 Jun 2026 12:15:00 +0000
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| 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 | |
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cvssV3_1
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MITRE
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Vulnrichment
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NVD
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Redhat
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Updated: 2026-06-09T13:45:05Z