VulnerabilityDeferred

CVE-2026-0773

Upsonic Cloudpickle Deserialization of Untrusted Data Remote Code Execution Vulnerability.

CRITICAL 9.8EPSS 1.34%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (1.34%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

Description

Upsonic Cloudpickle Deserialization of Untrusted Data Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Upsonic. Authentication is not required to exploit this vulnerability. The specific flaw exists within the add_tool endpoint, which listens on TCP port 7541 by default. The issue results from the lack of proper validation of user-supplied data, which can result in deserialization of untrusted data. An attacker can leverage this vulnerability to execute code in the context of the service account. Was ZDI-CAN-26845.

CVSS 3.0: 9.8 CRITICALCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS: 1.34% probability · 70th percentile
CISA KEV: Not listed
Weakness: CWE-502
Source: zdi-disclosures@trendmicro.com

References

https://www.zerodayinitiative.com/advisories/ZDI-26-042/

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.