CVE-2026-72705 Rocq Prover before 9.2.0 Guard Checker Accepts Fixpoint Passed as a Higher-Order Argument

The guard checker in Rocq Prover does not follow recursive calls made through a fixpoint's own arguments. A fixpoint may pass itself as a higher-order argument to a second fixpoint, which then applies it to a value that is not a subterm of the structural argument. Passing the recursive function t...

CVE-2026-72705

CVE-2026-72705 is a soundness flaw in the guard checker of Rocq Prover (before 9.2.0). The checker fails to track recursive calls when a fixpoint passes itself as a higher-order argument to another fixpoint, which then applies it to a non-subterm value. This admits a type definitionally equal to ...

EUVD-2026-65141

The guard checker in Rocq Prover does not follow recursive calls made through a fixpoint's own arguments. A fixpoint may pass itself as a higher-order argument to a second fixpoint, which then applies it to a value that is not a subterm of the structural argument. Passing the recursive function t...