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TI-2026-70935 Aliases CVE-2026-52903GHSA-rwm4-fgr7-vcr6

Unsafe YAML fallback in ManageIQ enables remote code execution

Priority MEDIUM 40CWE-502Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-502.

Summary

ManageIQ and Red Hat CloudForms are affected in all versions. The YamlLoadAliases module makes YAML.safe_load fall back silently to YAML.unsafe_load in production when a Psych::DisallowedClass error occurs, a deserialization of untrusted data flaw (CWE-502). An authenticated attacker with dialog import access can achieve remote code execution by uploading a crafted YAML payload that triggers the fallback.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Description from the CNA

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00447 39th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
ManageIQManageIQall versions—No fix listedCNA
Red HatRed Hat CloudFormsall versions—No fix listedCNA
  • ManageIQ VendorManageIQ Affected all versions Fixed in — No fix listed CNA
  • Red Hat CloudForms VendorRed Hat Affected all versions Fixed in — No fix listed CNA

Remediation

The sources list no fixed version for ManageIQ or Red Hat CloudForms. Red Hat CloudForms has reached End of Life and no errata or patches will be issued.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat

Timeline

  1. 2026-10-12 Threatist record created from CVE-2026-52903
  2. 2026-10-12 Alias added: GHSA-rwm4-fgr7-vcr6
  3. 2026-10-13 Priority changed: MEDIUM → LOW
  4. 2026-10-15 CISA SSVC decision points changed
  5. 2026-10-15 Priority changed: LOW → MEDIUM

References

Other 2

  • TI-2014-00150 OS command injection in awesome_spawn CVSS 3.1CRITICAL 9.8
  • TI-2021-12424 Arbitrary eval through MiqExpression CVSS 3.1HIGH 8.8
  • TI-2026-18159 ManageIQ vulnerable to DoS Attack when creating TimeProfiles CVSS 4.0HIGH 7.1

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences