Werk #19961: Update Windows agent Python runtime to 3.13.13
| Component | Agent bakery | ||
| Title | Update Windows agent Python runtime to 3.13.13 | ||
| Date | Apr 30, 2026 | ||
| Level | Prominent Change | ||
| Class | Bug Fix | ||
| Compatibility | Compatible - no manual interaction needed | ||
| Checkmk versions & editions |
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The Python runtime bundled with the Windows Checkmk agent has been updated to 3.13.13. This update was motivated by CVE-2025-15467, a stack-based buffer overflow in OpenSSL affecting CMS/PKCS#7 AuthEnvelopedData message parsing. The vulnerability does not directly affect Checkmk, but keeping the bundled runtime current reduces exposure to underlying library issues.