{"id":"PYSEC-2026-289","summary":"Azure AI Language Authoring Elevation of Privilege Vulnerability can Lead to RCE","details":"Deserialization of untrusted data in the Azure AI Language Conversations Authoring client library for Python allows an unauthorized attacker to execute code over a network.","aliases":["CVE-2026-21531","GHSA-436v-jg82-p533"],"modified":"2026-07-01T20:22:49.625745Z","published":"2026-06-29T11:50:51.457063Z","references":[{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-21531"},{"type":"PACKAGE","url":"https://github.com/Azure/azure-sdk-for-python"},{"type":"WEB","url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21531"},{"type":"PACKAGE","url":"https://pypi.org/project/azure-ai-language-conversations-authoring"},{"type":"ADVISORY","url":"https://github.com/advisories/GHSA-436v-jg82-p533"}],"affected":[{"package":{"name":"azure-ai-language-conversations-authoring","ecosystem":"PyPI","purl":"pkg:pypi/azure-ai-language-conversations-authoring"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.0.0b4"}]}],"versions":["1.0.0b1","1.0.0b2","1.0.0b3"],"database_specific":{"source":"https://github.com/pypa/advisory-database/blob/main/vulns/azure-ai-language-conversations-authoring/PYSEC-2026-289.yaml"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"}]}