Reference page — cumulative record through Saturday, October 3, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2020-37268

CVE-2020-37268MEDIUM

rocq-prover rocq — Coq and Rocq Prover Print Assumptions Omits Unsafe Universe Checking Inlined Through Parameter Inline

  AV  AC  AT  PR  UI  VC  VI  VA   CVSS    EPSS   %ile   KEV
   L   L   N   N   P   N   H   N    6.8   .0018    7.2     —

AFFECTED
  Product  Versions  Fixed
  rocq     8.11 –    —

TIMELINE
  Aug 19  Reserved by VulnCheck
  Aug 24  EXPLOIT PUBLISHED — CVE-2020-37268 (rocq-prover rocq). Public exploit reference added.
  Aug 24  Published (CNA: VulnCheck)
  Aug 25  EXPLOIT PUBLISHED — CVE-2020-37268 (rocq-prover rocq). Public exploit reference added.
  Sep 24  EXPLOIT PUBLISHED — CVE-2020-37268 (rocq-prover rocq). Public exploit reference added.

CWE-778 · CNA: VulnCheck · CVSS v4.0 · 5 references · NVD status: Deferred

Description

Print Assumptions does not report that a definition was produced while universe checking was disabled when that definition reaches the caller through Parameter Inline in a module type. Applying a functor inlines the body of the parameter, and the inlining drops the record that the term was built under Unset Universe Checking, so the resulting constant carries no trace of the unsafe operation. A module implementation can therefore prove False using a universe inconsistency, expose it through an inlined parameter, and have Print Assumptions report the dependent proof as closed under the global context. Because Print Assumptions is the in-process audit used to confirm that a development rests on no unexpected assumptions, a dependency built this way passes that audit while proving arbitrary propositions. The standalone checker coqchk does reject the resulting compiled file. The project records this in dev/doc/critical-bugs.md under non-fixed bugs and rates the risk as moderate when coqchk is not used.

Lifecycle

Complete event history — 5 events, chronological
Date	Event	Detail
August 19, 2026	Reserved	Reserved by VulnCheck
August 24, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2020-37268 (rocq-prover rocq). Public exploit reference added.
August 24, 2026	Published	Published (CNA: VulnCheck)
August 25, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2020-37268 (rocq-prover rocq). Public exploit reference added.
September 24, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2020-37268 (rocq-prover rocq). Public exploit reference added.

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
rocq-prover	rocq	—	8.11	—

Weaknesses

CWE-778

References (5)

https://github.com/endrazine/rocq-cve-poc-12155 [exploit]
https://github.com/rocq-prover/rocq [product]
https://github.com/rocq-prover/rocq/blob/master/dev/doc/critical-bugs.md [technical-description]
https://github.com/rocq-prover/rocq/issues/12155 [issue-tracking]
https://www.vulncheck.com/advisories/coq-and-rocq-prover-print-assumptions-omits-unsafe-universe-checking-inlined-through-parameter-inline [third-party-advisory]

Authoritative record: CVE-2020-37268 at cve.org

Vendors: rocq-prover

Weaknesses: CWE-778

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2020-37268 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Saturday, October 3, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.