CVE-2026-31250
📛 CVE Title
CVE-2026-31250
Description
CosyVoice thru commit 6e01309e01bc93bbeb83bdd996b1182a81aaf11e (2025-30-21) contains an insecure deserialization vulnerability (CWE-502) in its average_model.py model averaging tool. The script loads PyTorch checkpoint files (epoch_*.pt) for model averaging using torch.load() without enabling the weights_only=True security parameter. This allows the deserialization of arbitrary Python objects via the pickle module. An attacker can exploit this by providing malicious checkpoint files within a directory. When a victim uses the tool to average models from this directory, arbitrary code is executed on the victim's system.
Overview
- State
- PUBLISHED
- Assigner (CNA)
- mitre
- CVSS severity
- high
- CVSS score
- 7.3 / 10
- CVSS vector
AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L- Effective score
- 7.3 / 10 HIGH source: CNA overview
- CWE(s)
- —
- Reserved
- 2026-03-09
- Published
- 2026-05-11 00:00 UTC
- Last updated
- 2026-05-12 19:05 UTC
- Source
- https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/31xxx/CVE-2026-31250.json
- Linked Threat
- CVE-2026-31250 — CVE-2026-31250
NVD triage scoring NVD CVE 2.0
Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.
- NVD published
- 2026-05-11 17:16:19 UTC
- NVD last modified
- 2026-05-12 20:16:33 UTC
- NVD CVSS v3.1
- 7.3 / 10 HIGH source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
- NVD CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L- Exploitability subscore
- 3.9 / 10
- Impact subscore
- 3.4 / 10
- EPSS score
- 0.0005 (probability of exploitation in next 30 days)
- EPSS percentile
- 14.58% vs all CVEs — higher = more likely to be exploited, as of 2026-05-24
NVD-assigned CWE(s):
CWE-502
(differs from the CNA list above)
NVD / KEV / EPSS data refreshed 2026-05-25 03:33 UTC. Re-run the 🛰 Backfill from NVD button above to refresh.
European Union Vulnerability Database ENISA EUVD
ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.
- EUVD ID
-
EUVD-2026-29097 - Assigner
- mitre
- Published
- May 11, 2026, 12:00:00 AM
- Updated
- May 12, 2026, 7:05:45 PM
- EUVD base score (CVSS 3.1)
-
7.3 / 10
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L - EUVD-reported EPSS
- 0.0500
- Vendors
- n/a
- Products
-
n/a (n/a)
ENISA description: CosyVoice thru commit 6e01309e01bc93bbeb83bdd996b1182a81aaf11e (2025-30-21) contains an insecure deserialization vulnerability (CWE-502) in its average_model.py model averaging tool. The script loads PyTorch checkpoint files (epoch_*.pt) for model averaging using torch.load() without enabling the weights_only=True security parameter. This allows the deserialization of arbitrary Python objects via the pickle module. An attacker can exploit this by providing malicious checkpoint files within a directory. When a victim uses the tool to average models from this directory, arbitrary code is executed on the victim's system.
Affected products (1)
| Vendor | Product | Versions | Platforms |
|---|---|---|---|
| n/a | n/a |
n/a (affected)
|
— |
Vendor references (2)
References embedded in the original CVE record by the assigning CNA.
Web references (5)
DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.
- https://github.com/FunAudioLLM/CosyVoice tenable:github.com
- https://nvd.nist.gov/vuln/detail/CVE-2026-31250 tenable:nvd.nist.gov
- https://www.cve.org/CVERecord?id=CVE-2026-31250 tenable:www.cve.org
- https://www.first.org/epss/ tenable:www.first.org
- https://www.notion.so/CVE-2026-31250-35d1e13931888147a9a3e1c5e239a0a7 tenable:www.notion.so
NVD-tagged references (2)
Reference list NVD curates from the CNA record, vendor advisories, and third-party reports. The tag chips below are NVD's analyst-assigned categories.
- https://github.com/FunAudioLLM/CosyVoice cve@mitre.org
- https://www.notion.so/CVE-2026-31250-35d1e13931888147a9a3e1c5e239a0a7 cve@mitre.org
Remediations (17)
Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.
-
web:carthageelectronics.com
Status: Actively exploited — CISA KEV listed — patch by May 12, 2026 What Happened On April 28, 2026 , CISA added CVE - 2026 -32202 to its Known Exploited Vulnerabilities (KEV) catalog with a federal remediation deadline of May 12, 2026 . This vulnerability is the result of an incomplete patch Microsoft released in February for CVE - 2026 -21510.
2026-05-23 21:46 UTC -
web:cybersecuritynews.com
Microsoft has released its April 2026 Patch Tuesday security update, addressing 168 vulnerabilities across its product portfolio including one actively exploited zero-day and one publicly disclosed flaw that organizations must prioritize immediately.
2026-05-23 21:46 UTC -
web:krebsonsecurity.com
For a clickable, per- patch breakdown, check out the SANS Internet Storm Center Patch Tuesday roundup. Running into problems applying any of these updates?
2026-05-23 21:46 UTC -
web:learn.microsoft.com
In this library you will find the following security documents that have been released by the Microsoft Security Response Center (MSRC). The MSRC investigates all reports of security vulnerabilities affecting Microsoft products and services, and releases these documents as part of the ongoing effort to help you manage security risks and help keep your systems protected. Please use the ...
2026-05-23 21:46 UTC -
web:redmondmag.com
Microsoft April 2026 Patch Tuesday fixed 163 CVEs , marking its second-largest security update. Three zero-day vulnerabilities impacted SharePoint, Chromium-based Edge workflows and Microsoft Defender.
2026-05-23 21:46 UTC -
web:securityaffairs.com
Microsoft Patch Tuesday security updates addressed 165 vulnerabilities, making it one of the largest updates by CVE count. One of the most interesting flaws fixed by the IT giant is a critical SharePoint zero-day, tracked as CVE - 2026 -32201, already exploited in attacks in the wild.
2026-05-23 21:46 UTC -
web:www.cisecurity.org
<p>Multiple vulnerabilities have been discovered in Microsoft products, the most severe of which could allow for remote code execution. Successful exploitation of the most severe of these vulnerabilities could result in an attacker gaining the same privileges as the logged-on user. Depending on the privileges associated with the user, an attacker could then install programs; view, change, or ...
2026-05-23 21:46 UTC -
web:www.malwarebytes.com
This month's Patch Tuesday addresses 167 vulnerabilities, including two zero-days that could lead to system compromise, data exposure, and privilege escalation.
2026-05-23 21:46 UTC -
web:www.pcworld.com
This month's Patch Tuesday includes an actively exploited Office zero-day vulnerability and several critical RCE bugs in Windows and Remote Desktop.
2026-05-23 21:46 UTC -
web:www.theregister.com
Attackers exploited a spoofing vulnerability in Microsoft SharePoint Server before Redmond issued a fix as part of April's mega Patch Tuesday. The monthly patch party included a whopping 165 new Microsoft CVEs . And the bug under active exploitation, CVE - 2026 -32201, is due to improper input validation in SharePoint that allows an unauthorized attacker to perform spoofing over a network. This ...
2026-05-23 21:46 UTC -
web:blog.qualys.com
With Qualys Policy Audit's out-of-the-box mitigation or Compensatory Controls, which reduce the risk of a vulnerability being exploited because the remediation ( fix / patch ) cannot be done immediately, these security controls are not recommended by any industry standards, such as CIS and DISA-STIG.
2026-05-26 02:51 UTC -
web:portal.msrc.microsoft.com
The Security Update Guide provides information on the latest Microsoft security updates, helping users understand and address potential vulnerabilities effectively.
2026-05-26 02:51 UTC -
web:thecyberexpress.com
Microsoft Patch Tuesday: Zero-Day Vulnerabilities in Focus A major focus of this Patch Tuesday April 2026 cycle is the remediation of two zero-day vulnerabilities. One of the most concerning issues is an actively exploited spoofing vulnerability in Microsoft SharePoint Server.
2026-05-26 02:51 UTC -
web:www.bleepingcomputer.com
Today is Microsoft's April 2026 Patch Tuesday with security updates for 167 flaws, including 2 zero-day vulnerabilities.
2026-05-26 02:51 UTC -
web:www.crowdstrike.com
Microsoft's April 2026 Patch Tuesday addresses 164 CVEs , featuring 8 Critical vulnerabilities, one exploited zero-day, and one disclosed zero-day.
2026-05-26 02:51 UTC -
web:www.notebookcheck.net
Microsoft April 2026 Patch Tuesday fixes 167 vulnerabilities, including an actively exploited SharePoint zero-day. Windows 11 KB5083769 and KB5082052 bring new builds and RDP security.
2026-05-26 02:51 UTC -
web:www.tenable.com
Microsoft patched 163 CVEs in April including two zero-day vulnerabilities in SharePoint and Microsoft Defender. CVE - 2026 -32201 was exploited in the wild.
2026-05-26 02:51 UTC
AI Forensic Analysis
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Raw JSON
The full cvelistV5 record. Download as CVE-2026-31250.json.
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