A heap overflow and SSO misconfiguration to compromise OpenAI internal repos

8.9 relevance

Detailed exploit compromising OpenAI repos, highly actionable and critical for AI security.

AI/ML hacktron.ai

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Why It Matters

For a platform engineer focused on AI/ML infrastructure, this demonstrates how a single image-processing library and a misconfigured SSO can cascade into full internal repo access at a frontier AI company, highlighting critical supply-chain and identity risks in your own stack.

Key Takeaways

Audit your SSO configuration for cross-product identity flaws and review any use of libheif or similar image decoders in your forum, upload, or media-processing pipelines.

Summary

Researchers chained a libheif heap overflow in OpenAI's Discourse forum (community.openai.com) with an SSO misconfiguration to take over employee ChatGPT/Codex accounts, gaining access to internal GitHub repos. The exploit, disclosed via Bugcrowd, was fixed within 14 hours; OpenAI paid a $6,500 bounty. The libheif vulnerability (part of the 'HEIF Heist' investigation) also impacts Slack, Meta, GitHub Enterprise, and Node.js frameworks like Next.js and Astro.

Author

rootxharsh