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CVE-2025-59941

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Date: September 29, 2025

go-f3 is a Golang implementation of Fast Finality for Filecoin (F3). In versions 0.8.8 and below, go-f3's justification verification caching mechanism has a vulnerability where verification results are cached without properly considering the context of the message. An attacker can bypass justification verification by submitting a valid message with a correct justification and then reusing the same cached justification in contexts where it would normally be invalid. This occurs because the cached verification does not properly validate the relationship between the justification and the specific message context it's being used with. This issue is fixed in version 0.8.9.

Severity Score

Severity Score

Weakness Type (CWE)

Authentication Bypass by Primary Weakness

CWE-305

Top Fix

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Upgrade Version

Upgrade to version github.com/filecoin-project/go-f3 - v0.8.9;github.com/filecoin-project/go-f3 - v0.8.9;https://github.com/filecoin-project/go-f3.git - v0.8.9

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): HIGH
Privileges Required (PR): LOW
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): HIGH
Availability (A): LOW

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