EUVD-2026-81062
GHSA-frgf-wpx9-58c9
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Authenticated low-privilege user (PR:L) reaches a network endpoint with no interaction; impact is unauthorized board creation only, so I:L with C:N/A:N.
Primary rating from Vendor (VulnCheck).
CVSS VectorVendor: VulnCheck
Lifecycle Timeline
2DescriptionCVE.org
kan through 0.6.0 fails to properly validate board creation permissions in the GitHub project import endpoint, allowing guests to create boards despite lacking board:create permission. Attackers can bypass authorization checks by using the importProjects mutation to create boards while remaining blocked on direct creation paths.
AnalysisAI
Guest-level users on kan through 0.6.0 can create boards they are not entitled to create by invoking the GitHub project import mutation, which never applies the board:create permission check that the normal board-creation path enforces. The impact is an authenticated, integrity-only authorization bypass (assessed CVSS 3.1 base 5.3, AV:N/AC:L/PR:L/UI:N/C:N/I:L/A:N) that requires the attacker to already hold a low-privilege account on the target instance; there is no disclosure of other users' data and no availability impact. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Requires an authenticated low-privilege account (guest lacking the board:create permission) on the target kan deployment (PR:L, UI:N). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | This is a genuine but low-severity authorization flaw, not a high-priority emergency. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | No vendor-released patch identifying an exact fixed version was available at time of analysis; track https://github.com/kanbn/kan/issues/628 and the repository releases for a kan build later than 0.6.0 that enforces the board:create permission inside the import path, and upgrade as soon as such a version is published. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same weakness CWE-862 – Missing Authorization
View allSame technique Authentication Bypass
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External POC / Exploit Code
Leaving vuln.today