Bug 2388449 (CVE-2025-55199)

Summary: CVE-2025-55199 helm.sh/helm/v3: Helm Chart JSON Schema Denial of Service
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: adudiak, alcohan, anjoseph, brainfor, dward, gparvin, jbalunas, jkoehler, jprabhak, jwendell, kshier, ldai, lphiri, lsharar, lucarval, manissin, njean, oblaut, omaciel, owatkins, pahickey, rcernich, rhaigner, rjohnson, sdawley, stcannon, wtam, yguenane
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in helm.sh/helm/v3. A maliciously crafted JSON Schema file can trigger excessive memory consumption during Helm Chart validation, leading to an out-of-memory (OOM) termination. A remote attacker, requiring user interaction to provide the crafted file, can trigger this condition. This issue results in an application level denial of service affecting the Helm process.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description OSIDB Bzimport 2025-08-14 00:01:08 UTC
Helm is a package manager for Charts for Kubernetes. Prior to version 3.18.5, it is possible to craft a JSON Schema file in a manner which could cause Helm to use all available memory and have an out of memory (OOM) termination. This issue has been resolved in Helm 3.18.5. A workaround involves ensuring all Helm charts that are being loaded into Helm do not have any reference of $ref pointing to /dev/zero.