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Microsoft Security Response CenterCVE-2025-12781

base64.b64decode() always accepts "+/" characters, despite setting altchars

MediumVendor CVSS 5.3 / 10 1 CVE Published Oct 21, 2026 at 1:09 AM UTC

Summary

Mariner

Products covered

  • azl3 python-py 1.11.0-1 on Azure Linux 3.0

Remediation

Release Notes

CVEs in this advisory 1

Updates

  1. Published by Microsoft Security Response Center

    The publication date reported by the vendor.

  2. Added to SecurityAlert

    We collected the advisory from the official source.