CVE-2026-59871 (MEDIUM): detected in Lambda Docker Images.

## CVE Details

| **CVE ID** | **Severity** | **Affected Package** | **Installed Version** | **Fixed Version** | **Date Published** | **Date of Scan** |
|-----------------|--------------|----------------------|-----------------------|-------------------|--------------------|------------------|
| [CVE-2026-59871](https://avd.aquasec.com/nvd/cve-2026-59871) | `MEDIUM` | `tar` | `7.5.15` | `7.5.18` | `2026-07-08T16:16:33.723Z` | `2026-07-22T10:18:15.468343918Z` |

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## Affected Docker Images

| **Image Name** | **SHA** |
|-----------------------------|---------------------------------------|
| `public.ecr.aws/lambda/nodejs:latest` | `public.ecr.aws/lambda/nodejs@sha256:eca040a64243f44373fae948c0c1e13563d924a0b4c1b6a3c18d598f288ebf3f` |
| `public.ecr.aws/lambda/nodejs:24` | `public.ecr.aws/lambda/nodejs@sha256:eca040a64243f44373fae948c0c1e13563d924a0b4c1b6a3c18d598f288ebf3f` |
| `public.ecr.aws/lambda/nodejs:22` | `public.ecr.aws/lambda/nodejs@sha256:7fb30f61a372768a2ee1c1af89340e2b3b69782bc1135b0101669ee1106d1d0c` |

---

## Description

> node-tar is a tar archive manipulation library for Node.js. Prior to 7.5.18, node-tar coerces all-digit PAX path and linkpath values in src/pax.ts to JavaScript numbers, causing downstream path handling such as normalizeWindowsPath(entry.path).split('/') to throw an uncaught TypeError. This issue is fixed in version 7.5.18.

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### Remediation Steps
- Update the affected package `tar` from version `7.5.15` to `7.5.18`.

### About this issue
- This issue may not contain all the information about the CVE nor the images it affects.
- This issue will not be updated with new information and the list of affected images may have changed since the creation of this issue.
- For more, visit [Lambda Watchdog](https://lambdawatchdog.com).
- This issue was created automatically by Lambda Watchdog.

Review the build definitions for the affected Lambda Node.js Docker image tags: latest, 24, and 22. Update the bundled tar package from 7.5.15 to 7.5.18, then rebuild and scan the listed image digests to confirm that CVE-2026-59871 is resolved.

Written by the indexing model from the issue text.