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CVE-2026-0773

CRITICAL
9.8
CVSS 3.0
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.

Metadata

CVE ID
CVE-2026-0773
State
PUBLISHED
Assigner
zdi
Reserved
2026-01-08 22:50 UTC
Published
2026-01-23 03:29 UTC
Last updated
2026-01-23 16:26 UTC
Primary CWE
CWE-502
CWE-502: Deserialization of Untrusted Data
Vendor / Product
Upsonic / Upsonic
Sources
cve.org  ·  NVD

Severity & Metrics

9.8 CRITICAL CVSS 3.0
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
SSVC — CISA Coordinator
Exploitation
none
Automatable
yes
Tech. Impact
total
Affected products (1)
VendorProductPlatformVersions
Upsonic Upsonic — 0.52.1
Weakness (CWE)
CWESourceDescription
CWE-502 cna CWE-502: Deserialization of Untrusted Data
CVSS scores (1)
ScoreSeverityVersionSourceVector
9.8 CRITICAL 3.0 cna CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
References (1)
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