[Snyk] Security upgrade python from 3.9-slim to 3.13.2-slim

[gitafolabi]

Snyk has created this PR to fix 4 vulnerabilities in the dockerfile dependencies of this project.

Keeping your Docker base image up-to-date means you’ll benefit from security fixes in the latest version of your chosen image.

Snyk changed the following file(s):

• voting-app/seed-data/Dockerfile

We recommend upgrading to python:3.13.2-slim, as this image has only 38 known vulnerabilities. To do this, merge this pull request, then verify your application still works as expected.

Vulnerabilities that will be fixed with an upgrade:

	Issue	Score
	Integer Overflow or Wraparound SNYK-DEBIAN12-ZLIB-6008963	500
	CVE-2024-12243 SNYK-DEBIAN12-GNUTLS28-8705121	371
	CVE-2025-24528 SNYK-DEBIAN12-KRB5-8679228	221
	CVE-2025-24528 SNYK-DEBIAN12-KRB5-8679228	221
	CVE-2025-0395 SNYK-DEBIAN12-GLIBC-8658672	150

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Important

• Check the changes in this PR to ensure they won't cause issues with your project.
• Max score is 1000. Note that the real score may have changed since the PR was raised.
• This PR was automatically created by Snyk using the credentials of a real user.

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[dryrunsecurity]

DryRun Security Summary

The PR upgrades the Python base image version while noting several security concerns including root execution, lack of user switching, security scanning, and package verification.

Expand for full summary

This PR updates the Python base image in the voting-app seed data Dockerfile from 3.9-slim to 3.13.2-slim, potentially introducing security patches and improvements. Security observations include: running as root, no explicit user switching, no security scanning in the build process, and no checksum verification for downloaded packages.

Code Analysis

We ran 9 analyzers against 1 file and 1 analyzer had findings. 8 analyzers had no findings.

Analyzer	Findings
Sensitive Files Analyzer	1 finding

View PR in the DryRun Dashboard.