CVE-2026-72704

CVE-2026-72704 affects the guard checker in Rocq Prover through 9.2.0 . The checker does not re-validate the recursive tree of an inductive type parameter after a transport -induced rewrite. A fixpoint can apply a type-equality rewrite to its recursive argument; the guard checker accepts the resu...

CVE-2026-72704 Rocq Prover through 9.2.0 Guard Checker Trusts Corrupted Recursive Tree After Transport

The guard checker in Rocq Prover does not recheck the recursive tree representation of an inductive type parameter after that parameter has been changed by transport. A fixpoint may apply a rewrite along an equality between types to its recursive argument, which the guard checker accepts because...