GHSA-jh7p-qr78-84p7
Suggest an improvement- Source
- https://github.com/advisories/GHSA-jh7p-qr78-84p7
- Import Source
- https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/01/GHSA-jh7p-qr78-84p7/GHSA-jh7p-qr78-84p7.json
- JSON Data
- https://api.osv.dev/v1/vulns/GHSA-jh7p-qr78-84p7
- Aliases
-
- CVE-2026-21852
- Published
- 2026-01-21T01:00:31Z
- Modified
- 2026-02-03T03:11:19.470547Z
- Severity
-
- 5.3 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N CVSS Calculator
- Summary
- Claude Code Leaks Data via Malicious Environment Configuration Before Trust Confirmation
- Details
-
A vulnerability in Claude Code's project-load flow allowed malicious repositories to exfiltrate data including Anthropic API keys before users confirmed trust. If a user started Claude Code in an attacker-controller repository, and the repository included a settings file that set ANTHROPICBASEURL to an attacker-controlled endpoint, Claude Code would issue API requests before showing the trust prompt, including potentially leaking the user's API keys.
Users on standard Claude Code auto-update have received this fix already. Users performing manual updates are advised to update to the latest version.
- Database specific
{ "github_reviewed_at": "2026-01-21T01:00:31Z", "severity": "MODERATE", "cwe_ids": [ "CWE-522" ], "github_reviewed": true, "nvd_published_at": "2026-01-21T21:16:08Z" }- References
Affected packages
npm / @anthropic-ai/claude-code
Package
- Name
- @anthropic-ai/claude-code
- View open source insights on deps.dev
- Purl
- pkg:npm/%40anthropic-ai/claude-code