Is CVE-2026-27952 actively exploited?

No active exploitation of CVE-2026-27952 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-27952 be exploited remotely?

Yes. CVE-2026-27952 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-27952?

CVE-2026-27952 has a CVSS score of 9.9 (CRITICAL) and an EPSS exploitation probability of 0.07%.

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CRITICAL

CVE-2026-27952

CWE-94Published: February 26, 2026· Updated: Mar 2, 2026

9.9

CVSS v3.1

EPSS:0.07%probability of exploitation in 30 daysPercentile:21.7th

Official Description

Agenta is an open-source LLMOps platform. In Agenta-API prior to version 0.48.1, a Python sandbox escape vulnerability existed in Agenta's custom code evaluator. Agenta used RestrictedPython as a sandboxing mechanism for user-supplied evaluator code, but incorrectly whitelisted the `numpy` package as safe within the sandbox. This allowed authenticated users to bypass the sandbox and achieve arbitrary code execution on the API server. The escape path was through `numpy.ma.core.inspect`, which exposes Python's introspection utilities — including `sys.modules` — thereby providing access to unfiltered system-level functionality like `os.system`. This vulnerability affects the Agenta self-hosted platform (API server), not the SDK when used as a standalone Python library. The custom code evaluator runs server-side within the API process. The issue is fixed in v0.48.1 by removing `numpy` from the sandbox allowlist. In later versions (v0.60+), the RestrictedPython sandbox was removed entirely and replaced with a different execution model.

NVD Source

Technical Analysis

CVE-2026-27952 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.9.

The vulnerability has a "Changed" scope, meaning successful exploitation can impact components beyond the vulnerable component itself — such as the host operating system or adjacent services.