CVE-2025-43849

CVE-2025-43849 is a critical-severity vulnerability in Rvc-project Retrieval-based-voice-conversion-webui with a CVSS 3.x base score of 9.8. 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-502.

Key facts

Description

Retrieval-based-Voice-Conversion-WebUI is a voice changing framework based on VITS. Versions 2.2.231006 and prior are vulnerable to unsafe deserialization. The ckpt_a and cpkt_b variables take user input (e.g. a path to a model) and pass it to the merge function in process_ckpt.py, which uses them to load the models on those paths with torch.load, which can lead to unsafe deserialization and remote code execution. As of time of publication, no known patches exist.

Frequently asked questions

What is CVE-2025-43849?
Retrieval-based-Voice-Conversion-WebUI is a voice changing framework based on VITS. Versions 2.2.231006 and prior are vulnerable to unsafe deserialization. The ckpt_a and cpkt_b variables take user input (e.g. a path to a model) and pass it to the merge function in process_ckpt.py, which uses them to load the models on those paths with torch.load, which can lead to unsafe deserialization and remote code execution. As of time of publication, no known patches exist.
How severe is CVE-2025-43849?
CVE-2025-43849 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2025-43849 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (51st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-43849?
CVE-2025-43849 affects Rvc-project Retrieval-based-voice-conversion-webui. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-43849?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2025-43849 have an EU (EUVD) identifier?
Yes. CVE-2025-43849 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-13501.
When was CVE-2025-43849 published?
CVE-2025-43849 was published on 2025-05-05 and last updated on 2026-06-17.

References

Affected products (1)

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