CVE-2026-11931: Insecure Permissions on Authentication Token Cache File in Kiro IDE

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-06-15 · updated 2026-10-25
Weakness: CWE-276

Description

Incorrect default permissions in Kiro IDE on macOS and Linux before version 0.11.133 could expose the authentication token cache file to other local users or processes via world-readable permissions (0644) instead of owner-restricted permissions (0600). To remediate this issue, users should upgrade to Kiro IDE version 0.11.133 or later. After upgrading and restarting the application, the cache file permissions are automatically updated on the next token refresh. Users operating in a multi-user environment can invalidate existing tokens by reauthenticating.

Affected products

AWS Kiro IDE: before 0.11.133 — fixed in 0.11.133

How to fix

Upgrade to a fixed version: AWS Kiro IDE 0.11.133. Check the vendor advisory for mitigations.

References

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