AnalysisCybersecurityOctober 26, 2026

Xint finds "Compaction Smuggling" flaw in OpenAI reasoning APIs

Read original source →securityweek.com

Xint bypassed OpenAI's mitigations for the August 2026 reasoning-trace extraction flaw, moving encrypted reasoning between models to steal traces usable for cheap distillation. OpenAI has since mitigated the new bypass.

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