# CVE-2026-11931: Amazon Kiro IDE incorrect permissions in authentication token cache

Source: https://junglewise.ai/threats/cve-2026-11931-amazon-kiro-ide-incorrect-permissions-in-authentication-token  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-06-15. Updated: 2026-09-25  
License: CC BY 4.0 with a link back

CVE-2026-11931 · Severity: high · CVSS 5.5 · Published 2026-06-15

Kiro IDE, a development environment tool, stores authentication tokens in a cache file with overly permissive access controls. An attacker with local access to the affected system could read these cached tokens to impersonate legitimate users or gain unauthorized access to protected resources and accounts.

Technologies: [Amazon AWS](https://junglewise.ai/threats/technologies/aws). Vendors: [Amazon](https://junglewise.ai/threats/vendors/amazon).

## Quick answers

**Is CVE-2026-11931 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-11931 being exploited in the wild.

**How severe is CVE-2026-11931?** High severity, with a CVSS score of 5.5, published 15 June 2026.

**Which products and versions are affected?** Kiro IDE.

**Is there a fix for CVE-2026-11931?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-11931 attacked?** It is attacked with local access.

**Am I affected by CVE-2026-11931?** Check whether you run Amazon AWS. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

CVE-2026-11931 is an insecure file permissions vulnerability in Kiro IDE where authentication tokens are cached in a file with overly permissive access controls. The vulnerable component is the authentication token cache mechanism. An attacker with local system access (e.g., through a shared system, container, or VM escape) can read the cache file to extract authentication tokens in plaintext or weakly protected form. The attack requires local file system access and does not require user interaction or network access. A successful exploit allows the attacker to obtain valid authentication credentials and use them to impersonate the legitimate user. Patches or configuration guidance to restrict file permissions should be available from the vendor.

## Affected products

- Kiro IDE

## Timeline

- 2026-09-22: disclosed

## References

- [https://aws.amazon.com/security/security-bulletins/rss/2026-045-aws/](https://aws.amazon.com/security/security-bulletins/rss/2026-045-aws/)

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