CVE-2026-11931

Insecure Permissions on Authentication Token Cache File in Kiro IDE

Assigner: AMZN
Reserved: 10.06.2026 Published: 15.06.2026 Updated: 15.06.2026

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.

Metrics

CVSS Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
CVSS Score: 6.8

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Local	Confidentiality	High	Confidentiality	None
Attack Complexity	Low	Integrity	None	Integrity	None
Attack Requirements	None	Availability	None	Availability	None
Privileges Required	Low
User Interaction	None

CVSS 4.0

CVSS Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
CVSS Score: 5.5

Attack Vector	Local	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	High
Privileges Required	Low	Integrity Impact	None
User Interaction	None	Availability Impact	None

CVSS 3.1

Product Status

Vendor	AWS
Product	Kiro IDE
Versions	Default: unaffected affected from 0 to 0.11.133 (excl.)

Vendor

AWS

Product

Kiro IDE

Versions

Default: unaffected

affected from 0 to 0.11.133 (excl.)

Credits

BeyondTrust Phantom Labs finder

References

Problem Types

CWE-276 Incorrect default permissions CWE

Impacts

CAPEC-1 Accessing Functionality Not Properly Constrained by ACLs