TI-2021-15871 Aliases CVE-2021-38194 GHSA-qj3v-q2vj-4c8h

An issue was discovered in the ark-r1cs-std crate before 0.3.1 for Rust.

MEDIUM 45CWE-682Published 2021-08-08 · Updated 2024-08-04

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: —
Confidentiality · integrity · availability: High · High · High
Fix status: Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub.

Summary

An issue was discovered in the ark-r1cs-std crate before 0.3.1 for Rust. It does not enforce any constraints in the FieldVar::mul_by_inverse method. Thus, a prover can produce a proof that is unsound but is nonetheless verified.

Why it matters now

EPSS 0.01275 70th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix Fixed ark-r1cs-std (crates.io): 0.3.1

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
—	—	all versions	—	No fix listed	CNA
—	ark-r1cs-std (crates.io)	0.2.0 to before 0.3.1	0.3.1	Patch available	GHSA-qj3v-q2vj-4c8h

— Vendor— Affected all versions Fixed in — No fix listed CNA
ark-r1cs-std (crates.io) Vendor— Affected 0.2.0 to before 0.3.1 Fixed in 0.3.1 Patch available GHSA-qj3v-q2vj-4c8h

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:arcworks:ark-r1cs-std::::::rust::*	before 0.3.1	Vulnerable	Arcworks

cpe:2.3:a:arcworks:ark-r1cs-std:*:*:*:*:*:rust:*:* Versions before 0.3.1 Vulnerable ·Arcworks

Remediation

Fix · GHSA-qj3v-q2vj-4c8h ark-r1cs-std (crates.io) Fixed in 0.3.1 Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2021-38194
2026-10-03 Alias added: GHSA-qj3v-q2vj-4c8h

References

Exploit 1

https://rustsec.org/advisories/RUSTSEC-2021-0075.html

Advisory 2

Other 3

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences