EUVD-2026-36779
GHSA-f64f-jmg7-95mg
Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Network-reachable admin functions exploitable with low complexity by an authenticated Editor (PR:L), yielding full account/config control (C:H/I:H); no direct availability impact claimed, so A:N.
Primary rating from Vendor (mitre).
CVSS VectorVendor: mitre
Lifecycle Timeline
3DescriptionCVE.org
Incorrect access control in the impworks Bonsai v6.0 allows authenticated attackers with Editor privileges to escalate privileges to Administrator and execute unauthorized account, password, and configuration changes.
AnalysisAI
Privilege escalation in impworks Bonsai v6.0 lets an authenticated user holding only Editor rights bypass access controls (CWE-284) to gain full Administrator control, enabling unauthorized account, password, and configuration changes. Exploitation is network-based and low-complexity but requires valid Editor credentials (CVSS 8.1, PR:L). Publicly available exploit code exists (a proof-of-concept gist is referenced and SSVC marks exploitation as 'poc'), though EPSS is low at 0.15% and the flaw is not in CISA KEV - no public exploit identified as actively weaponized at time of analysis.
Technical ContextAI
Bonsai is an open-source self-hosted family-tree/genealogy wiki web application developed by the 'impworks' project, built on ASP.NET. The vulnerability is a CWE-284 Incorrect Access Control weakness: authorization checks fail to properly enforce the boundary between the Editor role and the Administrator role, so an Editor-level session can invoke administrative functions (user/account management, password resets, and application configuration) that should be gated to Administrators. Root cause is missing or broken server-side role enforcement on privileged endpoints rather than a memory-safety or injection defect. Note the CPE string supplied (cpe:2.3:a:n/a:n/a:*) is a placeholder ('n/a') and does not encode the real product/version, so exact affected-component identification relies on the description rather than structured CPE data.
RemediationAI
No vendor-released patch identified at time of analysis; no fix version is present in the provided data, so do not assume a patched release without confirming against the impworks Bonsai GitHub project. As compensating controls, restrict issuance of Editor-role accounts to fully trusted users only and audit existing Editor accounts, since the attack requires valid Editor credentials - removing untrusted Editors directly removes the attack surface (trade-off: reduces collaborative editing). Place the Bonsai instance behind authenticated reverse-proxy access control or a VPN/allowlist so the network-reachable admin functions are not exposed to broad user populations (trade-off: adds friction for legitimate remote editors). Monitor application and account-management logs for unexpected role changes, password resets, or configuration edits originating from Editor accounts as a detection measure. Consult the NVD entry (https://nvd.nist.gov/vuln/detail/CVE-2026-50881) and the POC (https://gist.github.com/pyuysig/68754e4c40161ea27fcf80be46c59e7c) to validate whether an upstream fix has since been published.
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Same weakness CWE-284 – Improper Access Control
View allSame technique Authentication Bypass
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External POC / Exploit Code
Leaving vuln.today