Malach-IT Boruta Server up to 0.9.x UserSettingsController BorutaIdentityWeb.UserSettingsController.update User resource consumption

Summaryinfo

A vulnerability classified as problematic has been found in Malach-IT Boruta Server up to 0.9.x. Impacted is the function BorutaIdentityWeb.UserSettingsController.update of the component UserSettingsController. Performing a manipulation of the argument User results in resource consumption. This vulnerability is identified as CVE-2026-49249. The attack can be initiated remotely. There is not any exploit available.

Detailsinfo

A vulnerability, which was classified as problematic, was found in Malach-IT Boruta Server up to 0.9.x. This affects the function BorutaIdentityWeb.UserSettingsController.update of the component UserSettingsController. The manipulation of the argument user with an unknown input leads to a resource consumption vulnerability. CWE is classifying the issue as CWE-400. The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources. This is going to have an impact on availability. The summary by CVE is:

Boruta is a standalone authorization server that aims to implement OAuth 2.0 and Openid Connect up to decentralized identity specifications. Prior to version 0.10.0, BorutaIdentityWeb.UserSettingsController.update/2 atomizes every key of the user-supplied request body via String.to_atom/1 before any validation. Because String.to_atom interns atoms permanently in the BEAM atom table (default cap 1,048,576 atoms; ERL_MAX_ATOMS), any authenticated end user can send PUT /users/settings with a user[<fresh-key>]=... body containing fresh keys per request and exhaust the global VM atom table. Once the table is full, the BEAM aborts with no more index entries in atom_tab and the entire OIDC server (auth, admin, gateway apps in the umbrella) crashes. The route is protected only by require_authenticated_user and a per-IP rate limit of 10 requests/second; a logged-in end user can hit it. The keys are atomized unconditionally before the downstream Accounts.update_user/6 call, so even failing updates contribute to exhaustion. This issue has been patched in version 0.10.0.

It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2026-49249 since 05/28/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1499 according to MITRE ATT&CK.

Upgrading to version 0.10.0 eliminates this vulnerability.

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Productinfo

Vendor

• Malach-IT

Name

• Boruta Server

Version

• 0.1
• 0.2
• 0.3
• 0.4
• 0.5
• 0.6
• 0.7
• 0.8
• 0.9

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CPE 2.2info

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