{"data":{"id":"6a65c8ff-6343-45cb-b5e7-2ead7f474992","title":"A pelican for GPT-5.5 via the semi-official Codex backdoor API","summary":"GPT-5.5 is a new AI model from OpenAI that is now available through Codex (a code-focused AI tool) and ChatGPT subscriptions, though the standard API is not yet available. The author created a tool called llm-openai-via-codex that lets users access GPT-5.5 through their existing Codex subscription by reverse-engineering how authentication tokens work, rather than waiting for the official API release.","solution":"N/A -- no mitigation discussed in source.","labels":["security"],"sourceUrl":"https://simonwillison.net/2026/Apr/23/gpt-5-5/#atom-everything","publishedAt":"2026-04-23T19:59:47.000Z","cveId":null,"cweIds":null,"cvssScore":null,"cvssSeverity":null,"severity":"info","attackType":[],"issueType":"news","affectedPackages":null,"affectedVendors":["OpenAI"],"affectedVendorsRaw":["OpenAI","GPT-5.5","Codex","ChatGPT","Anthropic","Claude","Peter Steinberger"],"classifierModel":"claude-haiku-4-5-20251001","classifierPromptVersion":"v3","cvssVector":null,"attackVector":null,"attackComplexity":null,"privilegesRequired":null,"userInteraction":null,"exploitMaturity":null,"epssScore":null,"patchAvailable":null,"disclosureDate":"2026-04-23T19:59:47.000Z","capecIds":null,"crossRefCount":0,"attackSophistication":"moderate","impactType":null,"aiComponentTargeted":"api","llmSpecific":true,"classifierConfidence":0.75,"researchCategory":null,"atlasIds":null}}