CVE-2026-53471 Migration-planner: agent api ignores jwt source_id claim
Authenticated attackers can bypass tenant isolation in migration-planner to modify other tenants' inventory and assessments due to missing JWT claim validation.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-53471?
CVE-2026-53471 is a critical missing authorization vulnerability in kebev2v:migration_assessment, published on 10 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.
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.
Weakness: CWE-639
Which versions are affected by CVE-2026-53471?
3 open source packages ship an affected version, including github.com/kubev2v/migration-planner. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
github.com/kubev2v/migration-planner Go | All versions | 0.13.5 |
github.com/kubev2v/migration-planner Go | All versions | 0.13.5 |
github.com/kubev2v/migration-planner Go | All versions | 0.13.5 |
Products include Kebev2v Migration Assessment.
How do I fix CVE-2026-53471?
Upgrade github.com/kubev2v/migration-planner to 0.13.5 or later.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-53471 being exploited?
There is no known exploitation of CVE-2026-53471 in the wild and no public exploit code.
Other vulnerabilities in kebev2v:migration_assessment
Sources
Also known as GHSA-2fqw-7c6r-2cq6, GO-2026-6228.