CVE-2026-107608: Improper link resolution in asset bundling output handling in aws-cdk-lib

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: 2026-10-08 · updated 2026-10-08
Weakness: CWE-59

Description

Improper link resolution before file access in the asset bundling output handling in AWS aws-cdk-lib before 2.267.0 might allow a context-dependent actor to cause files from the build host to be published as the deployed asset. To remediate this issue, users should upgrade to version 2.267.0 or later.

Affected products

aws-cdk-lib: before 2.267.0 — fixed in 2.267.0

How to fix

Upgrade to a fixed version: aws-cdk-lib 2.267.0. Check the vendor advisory for mitigations.

References

https://aws.amazon.com/security/security-bulletins/2026-131-aws/
https://github.com/aws/aws-cdk/releases/tag/v2.267.0

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