{
	"document":{
		"aggregate_severity":{
			"namespace":"https://nvd.nist.gov/vuln-metrics/cvss",
			"text":"Critical"
		},
		"category":"csaf_vex",
		"csaf_version":"2.0",
		"distribution":{
			"tlp":{
				"label":"WHITE",
				"url":"https:/www.first.org/tlp/"
			}
		},
		"lang":"en",
		"notes":[
			{
				"text":"python-jupyter-server security update",
				"category":"general",
				"title":"Synopsis"
			},
			{
				"text":"An update for python-jupyter-server is now available for openEuler-24.03-LTS-SP4",
				"category":"general",
				"title":"Summary"
			},
			{
				"text":"The backend for Jupyter web applications\n\nSecurity Fix(es):\n\nThe nbconvert HTTP handlers in jupyter_server render user-authored notebook HTML under the Jupyter origin without a sandbox directive in their `Content-Security-Policy`. Combined with `nbconvert.HTMLExporter`'s default non-sanitizing behavior, a notebook carrying an HTML payload in a display_data output triggers stored XSS with cookie access, full /api/* authority, and kernel RCE. An authenticated victim who navigates to `/nbconvert/html/<path>` containing attacker-authored output can have their token exfiltrated to another domain because it is executed in the Jupyter origin.(CVE-2026-44727)",
				"category":"general",
				"title":"Description"
			},
			{
				"text":"An update for python-jupyter-server is now available for openEuler-24.03-LTS-SP4.\n\nopenEuler Security has rated this update as having a security impact of critical. A Common Vunlnerability Scoring System(CVSS)base score,which gives a detailed severity rating, is available for each vulnerability from the CVElink(s) in the References section.",
				"category":"general",
				"title":"Topic"
			},
			{
				"text":"Critical",
				"category":"general",
				"title":"Severity"
			},
			{
				"text":"python-jupyter-server",
				"category":"general",
				"title":"Affected Component"
			}
		],
		"publisher":{
			"issuing_authority":"openEuler security committee",
			"name":"openEuler",
			"namespace":"https://www.openeuler.org",
			"contact_details":"openeuler-security@openeuler.org",
			"category":"vendor"
		},
		"references":[
			{
				"summary":"openEuler-SA-2026-3956",
				"category":"self",
				"url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-3956"
			},
			{
				"summary":"CVE-2026-44727",
				"category":"self",
				"url":"https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2026-44727&packageName=python-jupyter-server"
			},
			{
				"summary":"nvd cve",
				"category":"external",
				"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-44727"
			},
			{
				"summary":"openEuler-SA-2026-3956 vex file",
				"category":"self",
				"url":"https://repo.openeuler.org/security/data/csaf/advisories/2026/csaf-openeuler-sa-2026-3956.json"
			}
		],
		"title":"An update for python-jupyter-server is now available for openEuler-24.03-LTS-SP4",
		"tracking":{
			"initial_release_date":"2026-09-21T15:06:04+08:00",
			"revision_history":[
				{
					"date":"2026-09-21T15:06:04+08:00",
					"summary":"Initial",
					"number":"1.0.0"
				}
			],
			"generator":{
				"date":"2026-09-21T15:06:04+08:00",
				"engine":{
					"name":"openEuler CSAF Tool V1.0"
				}
			},
			"current_release_date":"2026-09-21T15:06:04+08:00",
			"id":"openEuler-SA-2026-3956",
			"version":"1.0.0",
			"status":"final"
		}
	},
	"product_tree":{
		"branches":[
			{
				"name":"openEuler",
				"category":"vendor",
				"branches":[
					{
						"name":"openEuler",
						"branches":[
							{
								"product":{
									"product_identification_helper":{
										"cpe":"cpe:/a:openEuler:openEuler:24.03-LTS-SP4"
									},
									"product_id":"openEuler-24.03-LTS-SP4",
									"name":"openEuler-24.03-LTS-SP4"
								},
								"name":"openEuler-24.03-LTS-SP4",
								"category":"product_version"
							}
						],
						"category":"product_name"
					},
					{
						"name":"src",
						"branches":[
							{
								"product":{
									"product_identification_helper":{
										"cpe":"cpe:/a:openEuler:openEuler:24.03-LTS-SP4"
									},
									"product_id":"python-jupyter-server-2.13.0-3.oe2403sp4.src.rpm",
									"name":"python-jupyter-server-2.13.0-3.oe2403sp4.src.rpm"
								},
								"name":"python-jupyter-server-2.13.0-3.oe2403sp4.src.rpm",
								"category":"product_version"
							}
						],
						"category":"architecture"
					},
					{
						"name":"noarch",
						"branches":[
							{
								"product":{
									"product_identification_helper":{
										"cpe":"cpe:/a:openEuler:openEuler:24.03-LTS-SP4"
									},
									"product_id":"python3-jupyter-server-2.13.0-3.oe2403sp4.noarch.rpm",
									"name":"python3-jupyter-server-2.13.0-3.oe2403sp4.noarch.rpm"
								},
								"name":"python3-jupyter-server-2.13.0-3.oe2403sp4.noarch.rpm",
								"category":"product_version"
							}
						],
						"category":"architecture"
					}
				]
			}
		],
		"relationships":[
			{
				"relates_to_product_reference":"openEuler-24.03-LTS-SP4",
				"product_reference":"python-jupyter-server-2.13.0-3.oe2403sp4.src.rpm",
				"full_product_name":{
					"product_id":"openEuler-24.03-LTS-SP4:python-jupyter-server-2.13.0-3.oe2403sp4.src",
					"name":"python-jupyter-server-2.13.0-3.oe2403sp4.src as a component of openEuler-24.03-LTS-SP4"
				},
				"category":"default_component_of"
			},
			{
				"relates_to_product_reference":"openEuler-24.03-LTS-SP4",
				"product_reference":"python3-jupyter-server-2.13.0-3.oe2403sp4.noarch.rpm",
				"full_product_name":{
					"product_id":"openEuler-24.03-LTS-SP4:python3-jupyter-server-2.13.0-3.oe2403sp4.noarch",
					"name":"python3-jupyter-server-2.13.0-3.oe2403sp4.noarch as a component of openEuler-24.03-LTS-SP4"
				},
				"category":"default_component_of"
			}
		]
	},
	"vulnerabilities":[
		{
			"cve":"CVE-2026-44727",
			"notes":[
				{
					"text":"The nbconvert HTTP handlers in jupyter_server render user-authored notebook HTML under the Jupyter origin without a sandbox directive in their `Content-Security-Policy`. Combined with `nbconvert.HTMLExporter`'s default non-sanitizing behavior, a notebook carrying an HTML payload in a display_data output triggers stored XSS with cookie access, full /api/* authority, and kernel RCE. An authenticated victim who navigates to `/nbconvert/html/<path>` containing attacker-authored output can have their token exfiltrated to another domain because it is executed in the Jupyter origin.",
					"category":"description",
					"title":"Vulnerability Description"
				}
			],
			"product_status":{
				"fixed":[
					"openEuler-24.03-LTS-SP4:python-jupyter-server-2.13.0-3.oe2403sp4.src",
					"openEuler-24.03-LTS-SP4:python3-jupyter-server-2.13.0-3.oe2403sp4.noarch"
				]
			},
			"remediations":[
				{
					"product_ids":[
						"openEuler-24.03-LTS-SP4:python-jupyter-server-2.13.0-3.oe2403sp4.src",
						"openEuler-24.03-LTS-SP4:python3-jupyter-server-2.13.0-3.oe2403sp4.noarch"
					],
					"details":"python-jupyter-server security update",
					"category":"vendor_fix",
					"url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-3956"
				}
			],
			"scores":[
				{
					"cvss_v3":{
						"baseSeverity":"CRITICAL",
						"baseScore":9.3,
						"vectorString":"CVSS:3.1/AV:N/AC:L/AT:N/PR:L/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
						"version":"3.1"
					},
					"products":[
						"openEuler-24.03-LTS-SP4:python-jupyter-server-2.13.0-3.oe2403sp4.src",
						"openEuler-24.03-LTS-SP4:python3-jupyter-server-2.13.0-3.oe2403sp4.noarch"
					]
				}
			],
			"threats":[
				{
					"details":"Critical",
					"category":"impact"
				}
			],
			"title":"CVE-2026-44727"
		}
	]
}