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Vulnerability Details :

CVE-2025-50461

Summary
Assigner-mitre
Assigner Org ID-8254265b-2729-46b6-b9e3-3dfca2d5bfca
Published At-19 Aug, 2025 | 00:00
Updated At-19 Aug, 2025 | 19:44
Rejected At-
Credits

A deserialization vulnerability exists in Volcengine's verl 3.0.0, specifically in the scripts/model_merger.py script when using the "fsdp" backend. The script calls torch.load() with weights_only=False on user-supplied .pt files, allowing attackers to execute arbitrary code if a maliciously crafted model file is loaded. An attacker can exploit this by convincing a victim to download and place a malicious model file in a local directory with a specific filename pattern. This vulnerability may lead to arbitrary code execution with the privileges of the user running the script.

Vendors
-
Not available
Products
-
Metrics (CVSS)
VersionBase scoreBase severityVector
Weaknesses
Attack Patterns
Solution/Workaround
References
HyperlinkResource Type
EPSS History
Score
Latest Score
-
N/A
No data available for selected date range
Percentile
Latest Percentile
-
N/A
No data available for selected date range
Stakeholder-Specific Vulnerability Categorization (SSVC)
▼Common Vulnerabilities and Exposures (CVE)
cve.org
Assigner:mitre
Assigner Org ID:8254265b-2729-46b6-b9e3-3dfca2d5bfca
Published At:19 Aug, 2025 | 00:00
Updated At:19 Aug, 2025 | 19:44
Rejected At:
▼CVE Numbering Authority (CNA)

A deserialization vulnerability exists in Volcengine's verl 3.0.0, specifically in the scripts/model_merger.py script when using the "fsdp" backend. The script calls torch.load() with weights_only=False on user-supplied .pt files, allowing attackers to execute arbitrary code if a maliciously crafted model file is loaded. An attacker can exploit this by convincing a victim to download and place a malicious model file in a local directory with a specific filename pattern. This vulnerability may lead to arbitrary code execution with the privileges of the user running the script.

Affected Products
Vendor
n/a
Product
n/a
Versions
Affected
  • n/a
Problem Types
TypeCWE IDDescription
textN/An/a
Type: text
CWE ID: N/A
Description: n/a
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://pytorch.org/docs/stable/generated/torch.load.html
N/A
https://github.com/volcengine/verl
N/A
https://github.com/volcengine/verl/blob/main/scripts/model_merger.py#L152
N/A
https://github.com/pytorch/pytorch/blob/main/SECURITY.md#loading-untrusted-data
N/A
https://github.com/Anchor0221/CVE-2025-50461
N/A
Hyperlink: https://pytorch.org/docs/stable/generated/torch.load.html
Resource: N/A
Hyperlink: https://github.com/volcengine/verl
Resource: N/A
Hyperlink: https://github.com/volcengine/verl/blob/main/scripts/model_merger.py#L152
Resource: N/A
Hyperlink: https://github.com/pytorch/pytorch/blob/main/SECURITY.md#loading-untrusted-data
Resource: N/A
Hyperlink: https://github.com/Anchor0221/CVE-2025-50461
Resource: N/A
▼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Problem Types
TypeCWE IDDescription
CWECWE-77CWE-77 Improper Neutralization of Special Elements used in a Command ('Command Injection')
Type: CWE
CWE ID: CWE-77
Description: CWE-77 Improper Neutralization of Special Elements used in a Command ('Command Injection')
Metrics
VersionBase scoreBase severityVector
3.16.5MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Version: 3.1
Base score: 6.5
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
Information is not available yet
▼National Vulnerability Database (NVD)
nvd.nist.gov
Source:cve@mitre.org
Published At:19 Aug, 2025 | 14:15
Updated At:20 Aug, 2025 | 14:40

A deserialization vulnerability exists in Volcengine's verl 3.0.0, specifically in the scripts/model_merger.py script when using the "fsdp" backend. The script calls torch.load() with weights_only=False on user-supplied .pt files, allowing attackers to execute arbitrary code if a maliciously crafted model file is loaded. An attacker can exploit this by convincing a victim to download and place a malicious model file in a local directory with a specific filename pattern. This vulnerability may lead to arbitrary code execution with the privileges of the user running the script.

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Secondary3.16.5MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Type: Secondary
Version: 3.1
Base score: 6.5
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
CPE Matches
Weaknesses
CWE IDTypeSource
CWE-77Secondary134c704f-9b21-4f2e-91b3-4a467353bcc0
CWE ID: CWE-77
Type: Secondary
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
Evaluator Description
Evaluator Impact

Evaluator Solution

Vendor Statements
References
HyperlinkSourceResource
https://github.com/Anchor0221/CVE-2025-50461cve@mitre.org
N/A
https://github.com/pytorch/pytorch/blob/main/SECURITY.md#loading-untrusted-datacve@mitre.org
N/A
https://github.com/volcengine/verlcve@mitre.org
N/A
https://github.com/volcengine/verl/blob/main/scripts/model_merger.py#L152cve@mitre.org
N/A
https://pytorch.org/docs/stable/generated/torch.load.htmlcve@mitre.org
N/A
Hyperlink: https://github.com/Anchor0221/CVE-2025-50461
Source: cve@mitre.org
Resource: N/A
Hyperlink: https://github.com/pytorch/pytorch/blob/main/SECURITY.md#loading-untrusted-data
Source: cve@mitre.org
Resource: N/A
Hyperlink: https://github.com/volcengine/verl
Source: cve@mitre.org
Resource: N/A
Hyperlink: https://github.com/volcengine/verl/blob/main/scripts/model_merger.py#L152
Source: cve@mitre.org
Resource: N/A
Hyperlink: https://pytorch.org/docs/stable/generated/torch.load.html
Source: cve@mitre.org
Resource: N/A

Change History

0
Information is not available yet

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