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PatchSiren cyber security CVE debrief

CVE-2026-53471 Red Hat CVE debrief

A flaw was found in migration-planner. The agent-API middleware processes JSON Web Tokens (JWTs) for authentication, but its UpdateSourceInventory and UpdateAgentStatus handlers fail to validate the source_id claim within these tokens against the requested source ID. This oversight allows an authenticated attacker with a valid agent token to manipulate data across different tenants, leading to a complete collapse of tenant isolation. This could result in unauthorized overwriting of victim inventory, planting of malicious credential URLs, or corruption of migration assessments.

Vendor
Red Hat
Product
migration-planner
CVSS
CRITICAL 9.6
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-10
Original CVE updated
2026-06-17
Advisory published
2026-06-10
Advisory updated
2026-06-17

Who should care

Users of migration-planner, especially those with multi-tenant environments, should be aware of this critical vulnerability.

Technical summary

The vulnerability has a CVSS score of 9.6 and is classified as CRITICAL. The CVSS vector is CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N. The weakness is categorized as CWE-639.

Defensive priority

high

Recommended defensive actions

  • Apply patches or updates provided by the vendor as soon as possible.
  • Review and update authentication and authorization mechanisms to ensure proper tenant isolation.
  • Monitor for suspicious activity and implement additional security measures to prevent exploitation.

Evidence notes

The vendor is listed as Unknown Vendor, but evidence suggests a connection to Redhat.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-53471 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-53471

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-53471 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-53471

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.