CVE-2026-53471CWE-639

Migration-planner: agent api ignores jwt source_id claim

Critical · published June 10, 2026

CVSS v3.1
9.6
EPSS
1%
Percentile
43.0
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
9.6 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N
CVSS v4.0
Not supplied
EPSS
0.00514 · 43.0th percentile
Weakness
CWE-639 · Authorization Bypass Through User-Controlled Key
Published
2026-06-10T13:55Z
EPSS history
Timeline
  • 10 JUN 13:55Z
    Migration-planner: agent api ignores jwt source_id claim
    cvelistv5