How severe is CVE-2025-56647?

CVE-2025-56647 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2025-56647 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (9th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2025-56647?

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

Does CVE-2025-56647 have an EU (EUVD) identifier?

Yes. CVE-2025-56647 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-207250.

When was CVE-2025-56647 published?

CVE-2025-56647 was published on 2026-02-12 and last updated on 2026-06-17.

CVE-2025-56647

CVE-2025-56647 is a medium-severity vulnerability with a CVSS 3.x base score of 6.5. 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-1385.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
EPSS exploit prediction: 0% (9th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-207250
Weakness: CWE-1385
Published: 2026-02-12
Last modified: 2026-06-17

Description

npm @farmfe/core before 1.7.6 is Missing Origin Validation in WebSocket. The development (hot module reloading) server does not validate origin when connecting to a WebSocket client. This allows attackers to surveil developers running Farm who visit their webpage and steal source code that is leaked by the WebSocket server.

Frequently asked questions

What is CVE-2025-56647?: npm @farmfe/core before 1.7.6 is Missing Origin Validation in WebSocket. The development (hot module reloading) server does not validate origin when connecting to a WebSocket client. This allows attackers to surveil developers running Farm who visit their webpage and steal source code that is leaked by the WebSocket server.
How severe is CVE-2025-56647?: CVE-2025-56647 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2025-56647 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (9th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2025-56647?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-56647 have an EU (EUVD) identifier?: Yes. CVE-2025-56647 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-207250.
When was CVE-2025-56647 published?: CVE-2025-56647 was published on 2026-02-12 and last updated on 2026-06-17.

References

Other CWE-1385 vulnerabilities

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CVE-2024-48849 — Critical (CVSS 9.4): Missing Origin Validation in WebSockets vulnerability in FLXEON. Session management was not sufficient to prevent…
CVE-2025-52882 — High (CVSS 8.8): Claude Code is an agentic coding tool. Claude Code extensions in VSCode and forks (e.g., Cursor, Windsurf, and…
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CVE-2025-54289 — High (CVSS 8.1): Privilege Escalation in operations API in Canonical LXD <6.5 on multiple platforms allows attacker with read…

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