Vulnerability · Published Jun 10, 2026 · Assigned by redhat

CVE-2026-53471Migration-planner: agent api ignores jwt source_id claim

Critical 9.6

In plain English

A critical-severity authorization bypass via user-controlled key in migration-planner. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 21% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)9.6Critical

Exploit odds (30 days)0.3%top 78.7% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Go	github.com/kubev2v/migration-planner	0.13.5	GHSA-2fqw-7c6r-2cq6
Go	github.com/kubev2v/migration-planner	0.13.5	GO-2026-6228

Affected products (as reported)

Vendor	Product	Versions
	migration-planner	0 – before 0.13.5

Weakness: CWE-639 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N

References

https://access.redhat.com/security/cve/CVE-2026-53471 vdb-entry, x_refsource_REDHAT
RHBZ#2487070 issue-tracking, x_refsource_REDHAT
https://github.com/kubev2v/migration-planner/pull/1213