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Seth Michael Larson
June 16, 2026
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Alpha-Omega × Python Software Foundation (PyCon US 2026 Sponsor Presentation)
Seth Michael Larson
June 16, 2026
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Transcript
[email protected]
WHAT WE’VE DONE AI IS CHANGING EVERYTHING HOW WE’RE
PLANNING TO SURVIVE Python Security
Alpha-Omega “Protect society by catalyzing sustainable security improvements to the
most critical open source software projects and ecosystems”
Python Software Foundation Security Developer Seth Larson Mike Fiedler PyPI
Safety & Security Engineer
“AI is changing everything” ≈ Security Tools + LLMs
What to expect: • Security Focus Areas • What’s the
Plan? • How YOU can Prepare • Q&A
Malware goes up and to the right
Watering Hole Attacks
“Watering Hole Attacks” Shai-Hulud, LiteLLM, Trivy, Phishing API Tokens Accounts
CI/CD Pipelines Cryptocurrency Ransomware Credentials Repeat 🔁 Malicious Release 📦😈
None
40-50% of installs are not locked/pinned!!!
Trusted Reporters & Quarantine
Python Package Index Audit #2
PyPI: Second Audit
Dependency Cooldowns Now in pip v26.1+ Available in uv, dependabot,
renovate
Security Vulnerabilities
Vulnpocalypse # Vuln Reports 📈 # Patches, Advisories 📈 Time
to Exploit 📉
~65 CVEs
None
None
7+ vulnerabilities in CPython, pip, uv 1 Critical, 3 High
Mitigated with PyPI 💡 Hypothesis + OSS-Fuzz
What’s next for PSF × Alpha-Omega?
Goal: Mitigate “Watering Hole” Attacks
Stop Watering Hole Attacks • Python Package Index: ◦ Trusted
Reporters (Auto-Quarantine) ◦ More Trusted Publishing providers ◦ Relinquishing Privileges? ( sudo Mode) ◦ “Staged Releases” • CPython: ◦ “Secure Distributions”
Goal: Improve Ecosystem Vulnerability “Capacity”
Threat Model Guide Scanning Projects Sec. Engineer Time Incident Response
How to prepare ...as a maintainer?
How to prepare ...as a maintainer? Know who to call:
[email protected]
[email protected]
How to prepare ...as a maintainer? #1: Zizmor #2: CodeQL,
Semgrep, Fuzzer, LLM
How to prepare ...as a maintainer? Threat Model “What isn’t
a vuln?”
How to prepare ...as a maintainer? Security Policy “CoC. Respect
maintainer time”
How to prepare ...as a maintainer? Vulnerability Reporting (Tickets)
How to prepare ...as a user?
How to prepare ...as a user? Lock your deps! pylock.toml,
uv.lock requirements.txt w/hashes
How to prepare ...as a user? Dependency Cooldowns
How to prepare ...as a user? Vulnerability Scanning
How to prepare ...as a user? Prepare for faster vuln.
patching and exploitation
[email protected]
8 TALKS! Saturday, May 16th 10:30am-5:30pm Room 103ABC NEW
Security Talk Track
THANK YOU! Q&A PSF Alpha-Omega PyPI