Vulnerability · Published Sep 29, 2025 · Assigned by GitHub_M
CVE-2025-59941go-f3 is Vulnerable to Cached Justification Verification Bypass
Medium 5.9
In plain English
A medium-severity security flaw in go-f3 from filecoin-project. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 16% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Go | github.com/filecoin-project/go-f3 | 0.8.9 | GHSA-7pq9-rf9p-wcrf |
| Go | github.com/filecoin-project/go-f3 | 0.8.9 | GO-2025-3989 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| filecoin-project | go-f3 | < 0.8.9 |
Weakness: CWE-305 · Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:L