aws-cdk-lib: OS Command Injection in NodejsFunction Bundling

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS 4.0

7.0 · CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N · score source

EPSS

• CVE-2026-11417: 0.99% estimated exploitation activity in the next 30 days; percentile 62.64 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

Summary AWS CDK (aws-cdk-lib) is an open-source framework for defining cloud infrastructure in code and provisioning it through AWS CloudFormation. OS command injection in the NodejsFunction local bundling pipeline in aws-cdk-lib before 2.245.0 (2.246.0 on Windows) might allow a threat actor who controls the value of one or more bundling properties (externalModules, define, loader, inject, or esbuildArgs) to execute arbitrary commands on the host running the CDK toolchain via injected shell metacharacters. This issue requires the threat actor to control the value of one or more of the affected bundling properties in the CDK application. Impact During local Lambda bundling, NodejsFunction assembled an esbuild command string from the bundling properties externalModules, define, loader, inject, and esbuildArgs and executed it via a shell (bash -c on Linux/macOS, cmd /c on Windows) through spawnSync. The property values were interpolated without escaping or validation, so values…

Published by the source

15 Jun 2026, 20:47 UTC

Last modified by the source

15 Jun 2026, 21:11 UTC

Source last checked

26 Oct 2026, 12:55 UTC

1. Revision 3 · amended · 26 Oct 2026

   Amended from ghsa record GHSA-999r-qq7v-r334

2. Revision 2 · amended · 24 Oct 2026

   Reviewed OSV alias/range/CVSS4 correction; package source scopes and original publication preserved. No customer finding resolved.

3. Revision 1 · created · 24 Oct 2026

   Published from osv record GHSA-999r-qq7v-r334

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# Patch Next advisory brief: CVE-2026-11417

Advisory: aws-cdk-lib: OS Command Injection in NodejsFunction Bundling
IDs: CVE-2026-11417, GHSA-999r-qq7v-r334
Record: https://patchnext.com/advisories/cve-2026-11417 (revision 3, source checked 26 Oct 2026, 12:55 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: High (CVSS 7.0)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: aws-cdk-lib 2.246.0. A vendor fix does not mean a deployment is fixed.

## Affected components
- npm aws-cdk-lib: affected < 2.246.0; fixed in 2.246.0

## Suggested inspection (read-only)
- `npm ls aws-cdk-lib --all`: lists every installed copy and version, including transitive ones. Run in the project root after `npm ci`.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on aws-cdk-lib.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://osv.dev/vulnerability/GHSA-999r-qq7v-r334 (OSV record GHSA-999r-qq7v-r334 lists affected ranges: npm aws-cdk-lib >=0 <2.246.0 (fixed))
- Verified: https://github.com/advisories/GHSA-999r-qq7v-r334 (GitHub-reviewed advisory GHSA-999r-qq7v-r334 lists affected ranges: npm aws-cdk-lib >=0 <2.246.0)

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