CVE-2020-37268 (GCVE-0-2020-37268)
Vulnerability from cvelistv5 – Published: 2026-08-24 20:08 – Updated: 2026-08-24 20:08
VLAI
EPSS
VEX
Title
Coq and Rocq Prover Print Assumptions Omits Unsafe Universe Checking Inlined Through Parameter Inline
Summary
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.
Severity
6.3 (Medium)
CWE
- CWE-778 - Insufficient Logging
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://github.com/rocq-prover/rocq | product |
| https://github.com/rocq-prover/rocq/issues/12155 | issue-tracking |
| https://github.com/rocq-prover/rocq/blob/master/d… | technical-description |
| https://github.com/endrazine/rocq-cve-poc-12155 | exploit |
| https://www.vulncheck.com/advisories/coq-and-rocq… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| rocq-prover | rocq |
Affected:
8.11 , ≤ 9.2.0
(custom)
|
guessed |
Date Public
2020-04-22 00:00
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"title": "Coq and Rocq Prover Print Assumptions Omits Unsafe Universe Checking Inlined Through Parameter Inline",
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"datePublished": "2026-08-24T20:08:28.079Z",
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"vulnerability-lookup:meta": {
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"redhat_vex": {
"current_release_date": "2026-08-24T21:18:42+00:00",
"cve": "CVE-2020-37268",
"id": "CVE-2020-37268",
"initial_release_date": "2020-01-01T00:00:00+00:00",
"product_status:known_not_affected": "1",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "coq: rocq: Coq and Rocq Provers: Logical inconsistency bypass via Print Assumptions omission",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2020/cve-2020-37268.json",
"version": "3"
}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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