Vulnerability-Lookup

CVE-2026-73627 (GCVE-0-2026-73627)

Vulnerability from cvelistv5 – Published: 2026-08-13 11:28 – Updated: 2026-08-13 11:28

Title

JupyterLab 4.6.0 Plugin Manager Lock-Rule Enforcement Bypass

Summary

JupyterLab (pip package 'jupyterlab') versions >=4.1.0,<=4.5.9 and >=4.6.0,<=4.6.1 contain a plugin manager lock-rule enforcement bypass. Two server-side enforcement gaps allow an authenticated user to circumvent administrator lock rules by making direct requests to the /lab/api/plugins endpoint, enabling or disabling plugins that were locked — including child plugins of multi-plugin extensions and plugins locked via the 'lock all' mechanism. This can impact data integrity and bypass hardening or restrictions (e.g., download/upload limits) implemented through locked plugins. Fixed in versions 4.6.2 and 4.5.10.

Severity

6 (Medium)


                        
                          CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N

CWE

CWE-602 - Client-Side Enforcement of Server-Side Security

Assigner

VulnCheck

References

2 references

URL	Tags
https://github.com/jupyterlab/jupyterlab/security…	vendor-advisory
https://www.vulncheck.com/advisories/jupyterlab-p…	third-party-advisory

Impacted products

2 products

Vendor	Product	Version
jupyterlab	jupyterlab	Unaffected: 0 , < 4.6.0 (semver)
jupyterlab	jupyterlab	Unaffected: 0 , < 4.1.0 (semver)

Date Public

2026-07-21 00:00

Credits

rexpository MUFFANUJ krassowski

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "affected",
          "packageURL": "pkg:pypi/jupyterlab",
          "product": "jupyterlab",
          "vendor": "jupyterlab",
          "versions": [
            {
              "lessThan": "4.6.0",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "packageURL": "pkg:pypi/jupyterlab",
          "product": "jupyterlab",
          "vendor": "jupyterlab",
          "versions": [
            {
              "lessThan": "4.1.0",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:a:jupyter:jupyterlab:4.1.0:*:*:*:*:*:*:*",
                  "vulnerable": true
                },
                {
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                  "vulnerable": true
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                {
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                  "vulnerable": true
                },
                {
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                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:a:jupyter:jupyterlab:4.6.0:alpha1:*:*:*:*:*:*",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:a:jupyter:jupyterlab:4.6.0:alpha2:*:*:*:*:*:*",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:a:jupyter:jupyterlab:4.6.0:alpha3:*:*:*:*:*:*",
                  "vulnerable": true
                },
                {
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                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:a:jupyter:jupyterlab:4.6.0:alpha5:*:*:*:*:*:*",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "reporter",
          "value": "rexpository"
        },
        {
          "lang": "en",
          "type": "finder",
          "value": "MUFFANUJ"
        },
        {
          "lang": "en",
          "type": "coordinator",
          "value": "krassowski"
        }
      ],
      "datePublic": "2026-07-21T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "JupyterLab (pip package \u0027jupyterlab\u0027) versions \u003e=4.1.0,\u003c=4.5.9 and \u003e=4.6.0,\u003c=4.6.1 contain a plugin manager lock-rule enforcement bypass. Two server-side enforcement gaps allow an authenticated user to circumvent administrator lock rules by making direct requests to the /lab/api/plugins endpoint, enabling or disabling plugins that were locked \u2014 including child plugins of multi-plugin extensions and plugins locked via the \u0027lock all\u0027 mechanism. This can impact data integrity and bypass hardening or restrictions (e.g., download/upload limits) implemented through locked plugins. Fixed in versions 4.6.2 and 4.5.10."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "PRESENT",
            "attackVector": "NETWORK",
            "baseScore": 6,
            "baseSeverity": "MEDIUM",
            "privilegesRequired": "LOW",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "NONE",
            "vulnConfidentialityImpact": "LOW",
            "vulnIntegrityImpact": "HIGH"
          },
          "format": "CVSS"
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-602",
              "description": "Client-Side Enforcement of Server-Side Security",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-13T11:28:26.249Z",
        "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "shortName": "VulnCheck"
      },
      "references": [
        {
          "name": "GitHub Security Advisory (GHSA-h5v5-8746-g7mm)",
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://github.com/jupyterlab/jupyterlab/security/advisories/GHSA-h5v5-8746-g7mm"
        },
        {
          "name": "VulnCheck Advisory: JupyterLab 4.6.0 Plugin Manager Lock-Rule Enforcement Bypass",
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://www.vulncheck.com/advisories/jupyterlab-plugin-manager-lock-rule-enforcement-bypass"
        }
      ],
      "title": "JupyterLab 4.6.0 Plugin Manager Lock-Rule Enforcement Bypass",
      "x_generator": {
        "engine": "vulncheck-endgame"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
    "assignerShortName": "VulnCheck",
    "cveId": "CVE-2026-73627",
    "datePublished": "2026-08-13T11:28:26.249Z",
    "dateReserved": "2026-08-13T11:17:25.160Z",
    "dateUpdated": "2026-08-13T11:28:26.249Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-73627",
      "date": "2026-08-14",
      "epss": "0.00249",
      "percentile": "0.16378"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-73627\",\"sourceIdentifier\":\"disclosure@vulncheck.com\",\"published\":\"2026-08-13T12:17:28.043\",\"lastModified\":\"2026-08-13T12:17:28.043\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"JupyterLab (pip package \u0027jupyterlab\u0027) versions \u003e=4.1.0,\u003c=4.5.9 and \u003e=4.6.0,\u003c=4.6.1 contain a plugin manager lock-rule enforcement bypass. Two server-side enforcement gaps allow an authenticated user to circumvent administrator lock rules by making direct requests to the /lab/api/plugins endpoint, enabling or disabling plugins that were locked \u2014 including child plugins of multi-plugin extensions and plugins locked via the \u0027lock all\u0027 mechanism. This can impact data integrity and bypass hardening or restrictions (e.g., download/upload limits) implemented through locked plugins. Fixed in versions 4.6.2 and 4.5.10.\"}],\"affected\":[{\"source\":\"disclosure@vulncheck.com\",\"affectedData\":[{\"vendor\":\"jupyterlab\",\"product\":\"jupyterlab\",\"defaultStatus\":\"affected\",\"packageURL\":\"pkg:pypi/jupyterlab\",\"versions\":[{\"version\":\"0\",\"lessThan\":\"4.6.0\",\"versionType\":\"semver\",\"status\":\"unaffected\"}]},{\"vendor\":\"jupyterlab\",\"product\":\"jupyterlab\",\"defaultStatus\":\"affected\",\"packageURL\":\"pkg:pypi/jupyterlab\",\"versions\":[{\"version\":\"0\",\"lessThan\":\"4.1.0\",\"versionType\":\"semver\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV40\":[{\"source\":\"disclosure@vulncheck.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"4.0\",\"vectorString\":\"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N/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\",\"baseScore\":6.0,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"attackRequirements\":\"PRESENT\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"vulnConfidentialityImpact\":\"LOW\",\"vulnIntegrityImpact\":\"HIGH\",\"vulnAvailabilityImpact\":\"NONE\",\"subConfidentialityImpact\":\"NONE\",\"subIntegrityImpact\":\"NONE\",\"subAvailabilityImpact\":\"NONE\",\"exploitMaturity\":\"NOT_DEFINED\",\"confidentialityRequirement\":\"NOT_DEFINED\",\"integrityRequirement\":\"NOT_DEFINED\",\"availabilityRequirement\":\"NOT_DEFINED\",\"modifiedAttackVector\":\"NOT_DEFINED\",\"modifiedAttackComplexity\":\"NOT_DEFINED\",\"modifiedAttackRequirements\":\"NOT_DEFINED\",\"modifiedPrivilegesRequired\":\"NOT_DEFINED\",\"modifiedUserInteraction\":\"NOT_DEFINED\",\"modifiedVulnConfidentialityImpact\":\"NOT_DEFINED\",\"modifiedVulnIntegrityImpact\":\"NOT_DEFINED\",\"modifiedVulnAvailabilityImpact\":\"NOT_DEFINED\",\"modifiedSubConfidentialityImpact\":\"NOT_DEFINED\",\"modifiedSubIntegrityImpact\":\"NOT_DEFINED\",\"modifiedSubAvailabilityImpact\":\"NOT_DEFINED\",\"Safety\":\"NOT_DEFINED\",\"Automatable\":\"NOT_DEFINED\",\"Recovery\":\"NOT_DEFINED\",\"valueDensity\":\"NOT_DEFINED\",\"vulnerabilityResponseEffort\":\"NOT_DEFINED\",\"providerUrgency\":\"NOT_DEFINED\"}}]},\"weaknesses\":[{\"source\":\"disclosure@vulncheck.com\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-602\"}]}],\"references\":[{\"url\":\"https://github.com/jupyterlab/jupyterlab/security/advisories/GHSA-h5v5-8746-g7mm\",\"source\":\"disclosure@vulncheck.com\"},{\"url\":\"https://www.vulncheck.com/advisories/jupyterlab-plugin-manager-lock-rule-enforcement-bypass\",\"source\":\"disclosure@vulncheck.com\"}]}}",
    "redhat_vex": {
      "aggregate_severity": "Important",
      "current_release_date": "2026-08-14T17:20:08+00:00",
      "cve": "CVE-2026-73627",
      "id": "CVE-2026-73627",
      "initial_release_date": "2026-08-13T11:28:26.249000+00:00",
      "product_status:known_affected": "17",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "jupyterlab: JupyterLab: Plugin manager lock-rule bypass allows unauthorized plugin control",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-73627.json",
      "version": "3"
    }
  }
}

GHSA-FPF6-H6P9-9RJR

Vulnerability from github – Published: 2026-08-13 12:31 – Updated: 2026-08-13 12:31

Details

Severity

6.0 (Medium)


                  
                    CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-73627"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-602"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-13T12:17:28Z",
    "severity": "MODERATE"
  },
  "details": "JupyterLab (pip package \u0027jupyterlab\u0027) versions \u003e=4.1.0,\u003c=4.5.9 and \u003e=4.6.0,\u003c=4.6.1 contain a plugin manager lock-rule enforcement bypass. Two server-side enforcement gaps allow an authenticated user to circumvent administrator lock rules by making direct requests to the /lab/api/plugins endpoint, enabling or disabling plugins that were locked \u2014 including child plugins of multi-plugin extensions and plugins locked via the \u0027lock all\u0027 mechanism. This can impact data integrity and bypass hardening or restrictions (e.g., download/upload limits) implemented through locked plugins. Fixed in versions 4.6.2 and 4.5.10.",
  "id": "GHSA-fpf6-h6p9-9rjr",
  "modified": "2026-08-13T12:31:11Z",
  "published": "2026-08-13T12:31:11Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/jupyterlab/jupyterlab/security/advisories/GHSA-h5v5-8746-g7mm"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-73627"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/jupyterlab-plugin-manager-lock-rule-enforcement-bypass"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N/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",
      "type": "CVSS_V4"
    }
  ]
}

ubuntu-cve-2026-73627

Vulnerability from osv_ubuntu

Published

2026-08-14 00:00

Modified

2026-08-14 00:00

Summary

Details

Severity

6.0 (Medium)


                    
                      CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2026-73627	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-73627	REPORT
	https://github.com/jupyterlab/jupyterlab/security…	REPORT
	https://www.vulncheck.com/advisories/jupyterlab-p…	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "jupyterlab",
            "binary_version": "4.0.11+ds1+~cs11.25.27-9"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "jupyterlab",
        "purl": "pkg:deb/ubuntu/jupyterlab@4.0.11+ds1+~cs11.25.27-9?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "4.0.11+ds1+~cs11.25.27-7",
        "4.0.11+ds1+~cs11.25.27-8",
        "4.0.11+ds1+~cs11.25.27-9"
      ]
    }
  ],
  "aliases": [],
  "details": "JupyterLab (pip package \u0027jupyterlab\u0027) versions \u003e=4.1.0,\u003c=4.5.9 and \u003e=4.6.0,\u003c=4.6.1 contain a plugin manager lock-rule enforcement bypass. Two server-side enforcement gaps allow an authenticated user to circumvent administrator lock rules by making direct requests to the /lab/api/plugins endpoint, enabling or disabling plugins that were locked \u2014 including child plugins of multi-plugin extensions and plugins locked via the \u0027lock all\u0027 mechanism. This can impact data integrity and bypass hardening or restrictions (e.g., download/upload limits) implemented through locked plugins. Fixed in versions 4.6.2 and 4.5.10.",
  "id": "UBUNTU-CVE-2026-73627",
  "modified": "2026-08-14T00:00:00Z",
  "published": "2026-08-14T00:00:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-73627"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-73627"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/jupyterlab/jupyterlab/security/advisories/GHSA-h5v5-8746-g7mm"
    },
    {
      "type": "REPORT",
      "url": "https://www.vulncheck.com/advisories/jupyterlab-plugin-manager-lock-rule-enforcement-bypass"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-73627"
  ]
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.

Action not permitted

CVE-2026-73627 (GCVE-0-2026-73627)

GHSA-FPF6-H6P9-9RJR

ubuntu-cve-2026-73627

Vulnerability from osv_ubuntu

Tags

Sightings

Nomenclature