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CVE-2025-59941

22
FAUCET Score

CVE-2025-59941 is a medium-severity vulnerability in go-f3 versions 0.8.8 and below, a Golang implementation of Fast Finality for Filecoin. It allows an attacker to bypass justification verification by reusing cached, valid justifications in invalid contexts due to improper contextual validation. The CVSS score is 6.5 (MEDIUM), indicating a network-exploitable vulnerability with high integrity impact and low availability impact, but requiring high attack complexity. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
< 0.8.9CPE matchmatch criteria
cpe:2.3:a:filecoin:go-f3:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.9MEDIUM

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:L

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
LOW
Exploitability Score
1.6
Impact Score
4.2
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.22%
Probability of exploitation in next 30 days
EPSS Percentile
13.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0022 is in the 1st percentile among its peer group of 19,955 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

github_advisorypatch availablevia nvd_reference
View patch
gopatch availablevia ghsa
Product: github.com/filecoin-project/go-f3Fixed in: 0.8.9

Vendor Advisories (1)

goGHSA-7pq9-rf9p-wcrfmedium

go-f3 Vulnerable to Cached Justification Verification Bypass

Sep 29, 2025

References

github.com / filecoin-project/go-f3/commit/76fff18cf07b21baccf537024bdb2fb41f75f6e2
Patch
github.com / filecoin-project/go-f3/security/advisories/GHSA-7pq9-rf9p-wcrf
Vendor Advisory