{"id":"CVE-2026-27952","summary":"Agenta has Python Sandbox Escape, Leading to Remote Code Execution (RCE)","details":"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.","aliases":["GHSA-pmgp-2m3v-34mq","PYSEC-2026-6"],"modified":"2026-08-12T03:51:33.206763955Z","published":"2026-02-26T01:38:00.760Z","database_specific":{"cwe_ids":["CWE-94"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/27xxx/CVE-2026-27952.json","cna_assigner":"GitHub_M"},"references":[{"type":"ADVISORY","url":"https://github.com/Agenta-AI/agenta/security/advisories/GHSA-pmgp-2m3v-34mq"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/27xxx/CVE-2026-27952.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-27952"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/agenta-ai/agenta","events":[{"introduced":"0"},{"fixed":"fecf9e1eec3aef35430ab82378bf23abb4214b4b"}],"database_specific":{"source":["AFFECTED_FIELD","CPE_RANGE"],"cpe":"cpe:2.3:a:agentatech:agenta:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"0"},{"fixed":"0.48.1"}]}}],"versions":["v0.48.0","v0.47.0","v0.46.1","v0.46.0","v0.45.4","v0.45.3","v0.44.4","v0.43.1","v0.43.0","v0.42.2","v0.42.1","v0.40.0","v0.39.3","v0.38.2","v0.38.1","v0.38.0","v0.37.1","v0.35.1","v0.34.3","v0.34.2","v0.34.1","v0.34.0","v0.33.8","v0.33.7","v0.33.6"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-27952.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}