CVE-2026-15895: OS command injection in jsii-diff in AWS jsii

Severity: high (CVSS 7.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-07-15 · updated 2026-10-24
Weakness: CWE-78

Description

OS command injection in the npm package loading component in AWS jsii-diff before 1.131.0 might allow context-dependent attackers to execute arbitrary commands via crafted package specifiers passed to the npm: source argument. To mitigate this issue, users should upgrade to jsii-diff v1.131.0 or later.

Affected products

AWS jsii: before 1.131.0 — fixed in 1.131.0

How to fix

Upgrade to a fixed version: AWS jsii 1.131.0. Check the vendor advisory for mitigations.

References

https://aws.amazon.com/security/security-bulletins/2026-057-aws/
https://github.com/aws/jsii/releases/tag/v1.131.0

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