CVE-2026-11931 Insecure Permissions on Authentication Token Cache File in Kiro IDE
Local attackers can read authentication tokens from Kiro IDE due to insecure file permissions, potentially leading to account takeover.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-11931?
CVE-2026-11931 is a medium-severity vulnerability in AWS Kiro IDE, published on 15 Jun 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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.
Weakness: CWE-276
Which versions are affected by CVE-2026-11931?
How do I fix CVE-2026-11931?
No fix has been published for CVE-2026-11931 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-11931 being exploited?
There is no known exploitation of CVE-2026-11931 in the wild and no public exploit code.
Sources
Also known as GHSA-vjw4-v5gx-3v45.