CVE-2026-72714: Rocq universe checking state desynchronised after module close (0 = 1 demonstrated) — 0-day

Posted by Jonathan Brossard on Oct 25 1. Summary ========== A soundness bug in the Rocq (formerly Coq) kernel allows construction of a checked proof of False — and by extension, any proposition, including 0 = 1 — without axioms, plugins, or unsafe flags. Print Assumptions reports the proof as closed under the global context. The module system does not correctly restore the universe checking flag when a module that locally disabled the check (`Local Unset Universe Checking`) is...

Published 26-Oct-2026 01:00 UTC · First seen 26-Oct-2026 00:58 UTC

Sources

• Open Source Security · 26-Oct-2026