How severe is CVE-2025-59941?

CVE-2025-59941 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability low.

Is CVE-2025-59941 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (13th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-59941?

CVE-2025-59941 affects Filecoin Go-f3. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-59941?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-59941 have an EU (EUVD) identifier?

Yes. CVE-2025-59941 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-31621.

When was CVE-2025-59941 published?

CVE-2025-59941 was published on 2025-09-29 and last updated on 2026-06-17.

CVE-2025-59941

CVE-2025-59941 is a medium-severity vulnerability in Filecoin Go-f3 with a CVSS 3.x base score of 5.9. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-305.

Key facts

Severity: Medium (CVSS 3.x base score 5.9)
EPSS exploit prediction: 0% (13th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-31621
Weakness: CWE-305
Affected product: Filecoin Go-f3
Published: 2025-09-29
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2025-59941?: 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.
How severe is CVE-2025-59941?: CVE-2025-59941 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability low.
Is CVE-2025-59941 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (13th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-59941?: CVE-2025-59941 affects Filecoin Go-f3. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-59941?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-59941 have an EU (EUVD) identifier?: Yes. CVE-2025-59941 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-31621.
When was CVE-2025-59941 published?: CVE-2025-59941 was published on 2025-09-29 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:filecoin:go-f3:*:*:*:*:*:*:*:*

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