Arbitrary Code Execution Vulnerability in Fujitsu Research's OneCompression Library
CVE-2026-73325

8.4HIGH

Key Information:

Vendor

Fujitsu Research

Status
Onecompression
Vendor
CVE Published:
12 August 2026

What is CVE-2026-73325?

The OneCompression library version 1.2.0 by Fujitsu Research contains a vulnerability that stems from unsafe deserialization practices. Through this flaw, attackers can supply a specially crafted model checkpoint file, allowing the execution of arbitrary Python code when the library loads the file. This is due to the unguarded call to torch.load in the QuantizedModelLoader.load_quantized_model_pt() method. By embedding malicious methods, attackers can exploit this vulnerability to run arbitrary system commands, posing significant risks to affected systems.

Affected Version(s)

OneCompression 0 <= 1.2.0

References

https://pypi.org/project/onecomp/
productpatch
https://pypi.org/project/onecomp/1.2.1/
product
https://www.vulncheck.com/advisories/fujitsu-onecompressi...
third-party-advisory

CVSS V4

Score:
8.4
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Nir Yehoshua from Cipher Security Labs
.