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Vulnerability · Published Jun 19, 2025 · Assigned by VulDB

CVE-2025-6279Upsonic Pickle add_tool cloudpickle.loads deserialization

Medium 5.5

In plain English

A medium-severity unsafe deserialization in Upsonic. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 44% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)5.5Medium
Exploit odds (30 days)0.5%top 56.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known

Official description

A vulnerability, which was classified as critical, has been found in Upsonic up to 0.55.6. This issue affects the function cloudpickle.loads of the file /tools/add_tool of the component Pickle Handler. The manipulation leads to deserialization. The exploit has been disclosed to the public and may be used.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
PyPIupsonic0.56.0GHSA-rpfv-46xj-5984
PyPIupsonic0.56.0PYSEC-2025-68

Affected products (as reported)

VendorProductVersions
n/a Upsonic 0.55.00.55.10.55.20.55.30.55.40.55.50.55.6

Weakness: CWE-502, CWE-20 · Vector: CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R

References