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

Severity: high (CVSS 8.0 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2025-06-19 · updated 2026-06-17
Weakness: CWE-20

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 products

Upsonic: through 0.55.6

References

https://github.com/Upsonic/Upsonic/issues/353
https://vuldb.com/?ctiid.313283
https://vuldb.com/?id.313283
https://vuldb.com/?submit.593099
https://github.com/Upsonic/Upsonic/issues/353

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