Vulnerability in Rocq-Prover Rocq
CVE-2026-72714
Rocq Prover does not restore the universe graph's copy of the universe checking flag when a module that locally disabled the check is closed. Local Unset Universe Checking inside a module is expected to last only until the module ends, and the global flag is restored, but the universe graph keeps its own copy which is left disabled. The two views then disagree: Test Universe Checking reports the check as enabled while the kernel continues to accept universe-inconsistent terms. With the constraint between two universes no longer enforced, Hurkens' paradox applies and yields a proof of False, from which any proposition follows. The proof uses no axioms, plugins or unsafe features once the module has closed, and Print Assumptions reports it as closed under the global context, so neither the assumption audit nor the flag query reflects the actual kernel state. No fix is available.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.3 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:N/I:H/A:N.
EPSS exploit prediction
EPSS: 0.002 (6.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 7th percentile — 6.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.001 · newest: 0.002 · change: +0.001
Affected products
Weakness classification (CWE)
References
- github.com/endrazine/rocq-cve-poc-22287 (exploit)
- github.com/rocq-prover/rocq (product)
- github.com/rocq-prover/rocq/issues/22287 (issue-tracking)
- VulnCheck Advisory: Rocq Prover through 9.2.0 Universe Checking State Desynchronised After Module Close (third-party-advisory)
Frequently asked questions
- What is CVE-2026-72714?
- CVE-2026-72714 is a medium-severity vulnerability in Rocq-Prover Rocq, classified under Incomplete Cleanup. CVSS score: 6.3/10. Published 2026-08-24.
- How severe is CVE-2026-72714?
- Medium severity. CVSS v3 base score is 6.3 out of 10.