Python 3.13 / OpenSSL 3.5.5 crashes on Windows with OPENSSL_Uplink ... no OPENSSL_Applink when SSLKEYLOGFILE is set

Bug report

Bug description:

Title: Python 3.13 / OpenSSL 3.5.5 crashes on Windows with OPENSSL_Uplink ... no OPENSSL_Applink when SSLKEYLOGFILE is set

Environment:

• OS: Windows
• Python: 3.13.12, 64-bit
• OpenSSL: OpenSSL 3.5.5 27 Jan 2026
• Application: ComfyUI Desktop / ComfyUI Manager
• GPU: NVIDIA RTX 3060

Problem:
When SSLKEYLOGFILE is set, Python exits immediately during HTTPS/network activity with:

OPENSSL_Uplink(...): no OPENSSL_Applink

There is no Python traceback because the process aborts in native OpenSSL code.

Reproduction:

1. Set an environment variable:

SSLKEYLOGFILE=E:\AI\Apps\Wireshark\sslkeys.log

2. Start ComfyUI with Manager public/network mode enabled.
3. During ComfyUI-Manager startup network/cache fetches, Python exits with:

OPENSSL_Uplink(...): no OPENSSL_Applink

Observed:
The process exits with code 1. No Python exception is raised.

Expected:
Setting SSLKEYLOGFILE should enable TLS key logging or fail gracefully, not abort the Python process.

Investigation:

• import ssl works.
• import aiohttp.resolver works.
• import requests, urllib3, github, and huggingface_hub work.
• ComfyUI runs in offline mode.
• ComfyUI Manager public mode crashes during online cache/network fetching.
• ProcMon showed access to E:\AI\Apps\Wireshark\sslkeys.log immediately before the crash.
• Clearing the environment variable fixes the issue:

set SSLKEYLOGFILE=

After removing SSLKEYLOGFILE, ComfyUI Manager starts successfully in public mode.

Workaround:
Remove SSLKEYLOGFILE from User/System environment variables.

Question:
Is this a known issue with Python 3.13 / OpenSSL 3.5.x on Windows when TLS key logging is enabled?

CPython versions tested on:

3.13

Operating systems tested on:

Windows

Bắt đầu bằng cách tái hiện lỗi SSLKEYLOGFILE trên Windows với Python 3.13 và OpenSSL 3.5.5 trong hoạt động HTTPS được mô tả; báo cáo không nêu tệp mã nguồn hoặc bài kiểm thử nào của CPython. Hoàn tất có nghĩa là xác định liệu CPython có chịu trách nhiệm hay không và bảo đảm việc ghi nhật ký khóa không còn làm tiến trình bị hủy, với kịch bản chế độ công khai của ComfyUI Manager được dùng để xác thực.