CVE-2026-52903 (GCVE-0-2026-52903)

Vulnerability from cvelistv5 – Published: 2026-10-12 12:16 – Updated: 2026-10-12 12:16
VLAI
Title
YAML safe_load production fallback to unsafe_load enables RCE via deserialization
Summary
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. Red Hat CloudForms, which was based on ManageIQ, has reached End of Life and is no longer supported. No errata or patches will be issued. This CVE is being assigned for the benefit of the ManageIQ community and downstream consumers.
Severity
8.8 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
redhat CNA under the redhat root
CNA scorecard B 81/100 over 978 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
ManageIQ ManageIQ Affected: 0 (custom)
guessed Create a notification for this product.
Red Hat Red Hat CloudForms Affected: 0 (custom)
guessed Create a notification for this product.
Credits
Red Hat would like to thank Martin Brodeur (Fluentlogic) for reporting this issue.
Show details on NVD website
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