How severe is CVE-2025-59942?

CVE-2025-59942 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2025-59942 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (23rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-59942?

CVE-2025-59942 affects Filecoin Go-f3. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-59942?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2025-59942 have an EU (EUVD) identifier?

Yes. CVE-2025-59942 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-31620.

When was CVE-2025-59942 published?

CVE-2025-59942 was published on 2025-09-29 and last updated on 2026-06-17.

CVE-2025-59942

CVE-2025-59942 is a high-severity vulnerability in Filecoin Go-f3 with a CVSS 3.x base score of 7.5. 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-190.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 0% (23rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-31620
Weakness: CWE-190
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 0.8.6 and below, go-f3 panics when it validates a "poison" messages causing Filecoin nodes consuming F3 messages to become vulnerable. A "poison" message can can cause integer overflow in the signer index validation, which can cause the whole node to crash. These malicious messages aren't self-propagating since the bug is in the validator. An attacker needs to directly send the message to all targets. This issue is fixed in version 0.8.7.

Frequently asked questions

What is CVE-2025-59942?: go-f3 is a Golang implementation of Fast Finality for Filecoin (F3). In versions 0.8.6 and below, go-f3 panics when it validates a "poison" messages causing Filecoin nodes consuming F3 messages to become vulnerable. A "poison" message can can cause integer overflow in the signer index validation, which can cause the whole node to crash. These malicious messages aren't self-propagating since the bug is in the validator. An attacker needs to directly send the message to all targets. This issue is fixed in version 0.8.7.
How severe is CVE-2025-59942?: CVE-2025-59942 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2025-59942 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (23rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-59942?: CVE-2025-59942 affects Filecoin Go-f3. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-59942?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2025-59942 have an EU (EUVD) identifier?: Yes. CVE-2025-59942 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-31620.
When was CVE-2025-59942 published?: CVE-2025-59942 was published on 2025-09-29 and last updated on 2026-06-17.

References

https://github.com/filecoin-project/go-f3/security/advisories/GHSA-g99p-47x7-mq88

Affected products (1)

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

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