GHSA-7pq9-rf9p-wcrf

Source

https://github.com/advisories/GHSA-7pq9-rf9p-wcrf

Import Source

https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/09/GHSA-7pq9-rf9p-wcrf/GHSA-7pq9-rf9p-wcrf.json

JSON Data

https://api.osv.dev/v1/vulns/GHSA-7pq9-rf9p-wcrf

Aliases

CVE-2025-59941

Published

2025-09-29T20:40:02Z

Modified

2025-09-30T15:16:03Z

Severity

5.9 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:L CVSS Calculator

Summary

go-f3 Vulnerable to Cached Justification Verification Bypass

Details

Description

A vulnerability exists in go-f3's justification verification caching mechanism where verification results are cached without properly considering the context of the message. An attacker can bypass justification verification by: 1. First submitting a valid message with a correct justification 2. 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.

Impact

Potential consensus integrity issues through invalid justification acceptance
Could affect network liveness if exploited systematically
May allow malicious actors to influence consensus decisions with invalid justifications
Requires significant power (350+ TiB due to power table rounding) to meaningfully exploit
It would also be difficult to exploit in a synchronised fashion, such that >1/3 of the network goes down at one time. This isn't a one-msg panic, where you can spam it and bring everyone down, because every node will have a different amount of memory andmany SPs also run redundant lotus nodes.

Patches

The fix was merged and released with go-f3 0.8.9. All node software (Lotus, Forest, Venus) are using a patched version of go-f3 with their updates for the nv27 network upgrade.

Workarounds

The are no immediate workarounds available. Nodes should upgrade to the patched version, which they will have done if participating in nv27 on Filecoin mainnet.

Credits

The bug was reported by @lgprbs via our bug bounty program. Thank you for the contributions.

Database specific

{
    "cwe_ids": [
        "CWE-305"
    ],
    "github_reviewed": true,
    "nvd_published_at": "2025-09-29T23:15:32Z",
    "github_reviewed_at": "2025-09-29T20:40:02Z",
    "severity": "MODERATE"
}

References

Affected packages

Go / github.com/filecoin-project/go-f3

Package

Name: github.com/filecoin-project/go-f3; View open source insights on deps.dev
Purl: pkg:golang/github.com/filecoin-project/go-f3

Affected ranges

Type: SEMVER
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

0.8.9