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CVE-2025-59941— go-f3 is Vulnerable to Cached Justification Verification Bypass

Quick assessment

Affected
filecoin-project go-f3
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Go implementation of Fast Finality in Filecoin是Filecoin开源的一个快速确认机制的Golang库。 Go implementation of Fast Finality in Filecoin 0.8.8及之前版本存在安全漏洞，该漏洞源于验证结果缓存机制未正确考虑消息上下文，可能导致攻击者绕过验证。

CVSS 5.9 · Medium EPSS 0.22% · P13

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2025-59941

Vulnerability Information
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Vulnerability Title
go-f3 is Vulnerable to Cached Justification Verification Bypass
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
使用基本弱点进行的认证绕过
Source: CVE Program / CVE List V5
Vulnerability Title
Go implementation of Fast Finality in Filecoin 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Go implementation of Fast Finality in Filecoin是Filecoin开源的一个快速确认机制的Golang库。 Go implementation of Fast Finality in Filecoin 0.8.8及之前版本存在安全漏洞，该漏洞源于验证结果缓存机制未正确考虑消息上下文，可能导致攻击者绕过验证。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
filecoin-project go-f3 < 0.8.9 -

II. Public POCs for CVE-2025-59941

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III. Intelligence Information for CVE-2025-59941

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IV. Related Vulnerabilities

Same product: go-f3
Same vendor: filecoin-project
Same weakness: CWE-305

V. Comments for CVE-2025-59941

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