go-f3 is Vulnerable to Cached Justification Verification Bypass
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- High
- Impact type
- —
- Confidentiality · integrity · availability
- None · High · Low
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub.
Summary
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| filecoin-project | go-f3 | before 0.8.9 | 0.8.9 | Patch available | CNA |
| — | github.com/filecoin-project/go-f3 (Go) | before 0.8.9 | 0.8.9 | Patch available | GHSA-7pq9-rf9p-wcrf |
- go-f3 Vendorfilecoin-project Affected before 0.8.9 Fixed in 0.8.9 Patch available CNA
- github.com/filecoin-project/go-f3 (Go) Vendor— Affected before 0.8.9 Fixed in 0.8.9 Patch available GHSA-7pq9-rf9p-wcrf
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:filecoin:go-f3:*:*:*:*:*:*:*:* | before 0.8.9 | Vulnerable | filecoin-project |
- cpe:2.3:a:filecoin:go-f3:*:*:*:*:*:*:*:* Versions before 0.8.9 Vulnerable ·filecoin-project
Remediation
- Fix · CNA go-f3 (filecoin-project) Fixed in 0.8.9
- Fix · GHSA-7pq9-rf9p-wcrf github.com/filecoin-project/go-f3 (Go) Fixed in 0.8.9 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2025-59941
- 2026-10-03 Alias added: GHSA-7pq9-rf9p-wcrf
References
Advisory 2
More filecoin-project Go-f3 vulnerabilities
- TI-2025-37330 go-f3 module vulnerable to integer overflow leading to panic CVSS 3.1HIGH 7.5
Sources
- CVE-2025-59941 · CVE Program
- CVE-2025-59941 · NVD
- FIRST EPSS
- GHSA-7pq9-rf9p-wcrf · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences