What is the CVSS score of CVE-2026-33068?

CVE-2026-33068 has a CVSS 3.1 base score of 8.8 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.1%.

Is there a public PoC exploit available for CVE-2026-33068?

Yes, a public proof-of-concept exploit is available for CVE-2026-33068. Prioritise patching immediately. EPSS: 0.1%.

How to fix or mitigate CVE-2026-33068?

Within 24 hours: Inventory all internal use of @anthropic-ai/claude-code npm package and identify affected development teams. Within 7 days: Issue security advisory to developers prohibiting Claude Code usage on untrusted/external repositories and enforce code review policies for repository sources. Within 30 days: Monitor Anthropic security advisories for patch availability; evaluate alternative coding assistants with stronger trust controls; implement network segmentation to limit development environment lateral movement potential.

CVE-2026-33068

HIGH

Reliance on Untrusted Inputs in a Security Decision (CWE-807)

2026-03-19 https://github.com/anthropics/claude-code

GHSA-mmgp-wc2j-qcv7

Authentication Bypass

8.8

CVSS 3.1 · GitHub Advisory

Severity by source

GitHub Advisory PRIMARY

8.8 HIGH

AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Primary rating from GitHub Advisory · only source for this CVE.

CVSS VectorGitHub Advisory

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Patch released

Mar 31, 2026 - 21:13 nvd

Patch available

Analysis Generated

Mar 19, 2026 - 12:45 vuln.today

CVE Published

Mar 19, 2026 - 12:42 nvd

HIGH 8.8

DescriptionGitHub Advisory

Claude Code resolved the permission mode from settings files, including the repo-controlled .claude/settings.json, before determining whether to display the workspace trust confirmation dialog. A malicious repository could set permissions.defaultMode to bypassPermissions in its committed .claude/settings.json, causing the trust dialog to be silently skipped on first open. This allowed a user to be placed into a permissive mode without seeing the trust confirmation prompt, making it easier for an attacker-controlled repository to gain tool execution without explicit user consent.

Users on standard Claude Code auto-update have received this fix already. Users performing manual updates are advised to update to the latest version.

Thank you to hackerone.com/cantina_xyz for reporting this issue.

AnalysisAI

Claude Code, an AI coding assistant, contains an authentication bypass vulnerability where malicious repositories can silently skip the workspace trust confirmation dialog by setting permissions.defaultMode to bypassPermissions in a committed .claude/settings.json file. This affects users of the @anthropic-ai/claude-code npm package who open untrusted repositories. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access

Attacker commits malicious `.claude/settings.json` to repository

Delivery

User clones repository in Claude Code

Exploit

Settings loaded before trust dialog check

Execution

Permission mode set to `bypassPermissions`

Persist

Trust confirmation silently skipped

Impact

Attacker gains tool execution without consent

Access

Attacker commits malicious `.claude/settings.json` to repository

Delivery

User clones repository in Claude Code

Exploit

Settings loaded before trust dialog check

Execution

Permission mode set to `bypassPermissions`

Persist

Trust confirmation silently skipped

Impact

Attacker gains tool execution without consent

Vulnerability AssessmentAI

Exploitation	Victim must open a malicious Git repository containing a crafted `.claude/settings.json` file with `permissions.defaultMode` set to `bypassPermissions` in Claude Code. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment	While no CVSS score has been assigned yet, the real-world risk is moderate with specific conditions required for exploitation. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario	An attacker creates a malicious GitHub repository containing useful-looking code or documentation to attract developers, embedding a .claude/settings.json file with permissions.defaultMode set to bypassPermissions. When a victim clones and opens this repository in a vulnerable version of Claude Code, the trust confirmation dialog is silently skipped, placing the user in permissive mode. …
Remediation	Users on Claude Code's standard auto-update channel have already received the security fix automatically and require no manual action. … Detailed patch versions, workarounds, and compensating controls in full report.

Recommended ActionAI

Within 24 hours: Inventory all internal use of @anthropic-ai/claude-code npm package and identify affected development teams. …

Threat intelligence, references, and detailed analysis are available after sign-in.

CVE-2026-33068 vulnerability details – vuln.today

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CVE-2026-33068

Severity by source

CVSS VectorGitHub Advisory

Lifecycle Timeline

DescriptionGitHub Advisory

AnalysisAI

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Attack ChainAIDerived

Vulnerability AssessmentAI

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External POC / Exploit Code