ZF FROST is a Rust implementation of FROST (Flexible Round-Optimised Schnorr Threshold signatures). In versions 2.0.0 through 2.1.0, refresh shares with smaller min_signers will reduce security of group. The inability to change min_signers (i.e. the threshold) with the refresh share functionality (frost_core::keys::refresh module) was not made clear to users. Using a smaller value would not decrease the threshold, and attempts to sign using a smaller threshold would fail. Additionally, after refreshing the shares with a smaller threshold, it would still be possible to sign with the original threshold, potentially causing a security loss to the participant's shares. This issue is fixed in version 2.2.0.

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Source ID Title
EUVD EUVD EUVD-2025-26877 ZF FROST is a Rust implementation of FROST (Flexible Round-Optimised Schnorr Threshold signatures). In versions 2.0.0 through 2.1.0, refresh shares with smaller min_signers will reduce security of group. The inability to change min_signers (i.e. the threshold) with the refresh share functionality (frost_core::keys::refresh module) was not made clear to users. Using a smaller value would not decrease the threshold, and attempts to sign using a smaller threshold would fail. Additionally, after refreshing the shares with a smaller threshold, it would still be possible to sign with the original threshold, potentially causing a security loss to the participant's shares. This issue is fixed in version 2.2.0.
Github GHSA Github GHSA GHSA-wgq8-vr6r-mqxm frost-core: refresh shares with smaller min_signers will reduce security of group
Fixes

Solution

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Workaround

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History

Fri, 05 Sep 2025 16:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Fri, 05 Sep 2025 14:15:00 +0000

Type Values Removed Values Added
First Time appeared Zcash
Zcash frost
Vendors & Products Zcash
Zcash frost

Fri, 05 Sep 2025 00:00:00 +0000

Type Values Removed Values Added
Description ZF FROST is a Rust implementation of FROST (Flexible Round-Optimised Schnorr Threshold signatures). In versions 2.0.0 through 2.1.0, refresh shares with smaller min_signers will reduce security of group. The inability to change min_signers (i.e. the threshold) with the refresh share functionality (frost_core::keys::refresh module) was not made clear to users. Using a smaller value would not decrease the threshold, and attempts to sign using a smaller threshold would fail. Additionally, after refreshing the shares with a smaller threshold, it would still be possible to sign with the original threshold, potentially causing a security loss to the participant's shares. This issue is fixed in version 2.2.0.
Title frost-core: refresh shares with smaller min_signers will reduce group security
Weaknesses CWE-325
References
Metrics cvssV4_0

{'score': 6, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2025-09-05T16:06:05.432Z

Reserved: 2025-08-29T16:19:59.010Z

Link: CVE-2025-58359

cve-icon Vulnrichment

Updated: 2025-09-05T16:06:00.064Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2025-09-05T00:15:32.500

Modified: 2025-09-05T17:47:10.303

Link: CVE-2025-58359

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2025-09-05T14:01:50Z

Weaknesses