Anthropic claude-code up to 2.1.259 Settings Endpoint privileges management

Summaryinfo

A vulnerability classified as problematic has been found in Anthropic claude-code up to 2.1.259. Impacted is an unknown function of the component Settings Endpoint. The manipulation leads to privileges management. This vulnerability is uniquely identified as CVE-2026-103012. Local access is required to approach this attack. No exploit exists. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in Anthropic claude-code up to 2.1.259. This issue affects some unknown processing of the component Settings Endpoint. The manipulation with an unknown input leads to a privileges management vulnerability. Using CWE to declare the problem leads to CWE-269. The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

Claude Code selected an API key stored by Claude Code, for example from an earlier `/login` or written directly to its configuration, ahead of the user's valid Claude Enterprise or Team sign-in when fetching the organization's server-managed settings, even though the session itself authenticated with the Enterprise or Team account. When the settings endpoint rejected that stored key, the session started without the organization's server-managed policy (such as permission deny rules, model restrictions and managed-only locks) or, if a previously cached copy existed on the machine, kept applying that stale copy without receiving later policy changes — while continuing to operate as the organization's account. Triggering this required local access to a device with such a stored API key; the no-policy case additionally required that no managed settings had previously been cached. Endpoint-managed (MDM or file-based) settings were not affected. Claude for Enterprise organizations were affected from version 2.0.68; Claude for Work (Team) organizations from version 2.1.38, when server-managed settings became available to them. Users on standard Claude Code auto-update have received this fix already. Users performing manual updates are advised to update to version 2.1.260 or later. Thank you to Tamas Voros / NVIDIA AI Red Team for reporting this issue.

The advisory is shared at github.com. The identification of this vulnerability is CVE-2026-103012 since 09/29/2026. The exploitation is known to be easy. An attack has to be approached locally. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1068 for this issue.

Upgrading to version 2.1.260 eliminates this vulnerability.

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Productinfo

Type

• Artificial Intelligence Software

Vendor

• Anthropic

Name

• claude-code

Version

• 2.1.259

CPE 2.3info

• 🔒

CPE 2.2info

• 🔒

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