CVE-2026-73416 (GCVE-0-2026-73416)
Vulnerability from cvelistv5
Published
2026-08-13 22:04
Modified
2026-08-17 17:17
Severity ?
VLAI Severity ?
EPSS score ?
CWE
Summary
jupyterlab is an extensible environment for interactive and reproducible computing, based on the Jupyter Notebook Architecture. From 4.5.0 until 4.5.10 and 4.6.2, in jupyterlab/extensions/manager.py and jupyterlab/extensions/pypi.py, JupyterLab's PyPI extension manager enforces blocked_extensions_uris by comparing requested install names to blocklist entries with custom normalization that is weaker than PyPI package-name canonicalization. An authenticated user can request a PyPI-equivalent spelling such as JupyterLab.Git for a blocklisted package such as jupyterlab-git, and JupyterLab accepts the install request even though pip resolves the variant to the same package. Security impact requires an allowlist or blocklist intended to restrict package installation, the PyPI Extension Manager, and kernels and terminals that are disabled or delegated to remote hosts. The bypass lets an authenticated user install a prohibited extension, defeat integrity restrictions, and affect availability without gaining new read access. This issue is fixed in versions 4.5.10 and 4.6.2.
References
| URL | Tags | |||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||||||||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| jupyterlab | jupyterlab |
Version: >= 4.5.0, < 4.5.10 Version: >= 4.6.0, < 4.6.2 |
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-73416",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-08-17T17:16:18.061380Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-08-17T17:17:59.508Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "jupyterlab",
"vendor": "jupyterlab",
"versions": [
{
"status": "affected",
"version": "\u003e= 4.5.0, \u003c 4.5.10"
},
{
"status": "affected",
"version": "\u003e= 4.6.0, \u003c 4.6.2"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "jupyterlab is an extensible environment for interactive and reproducible computing, based on the Jupyter Notebook Architecture. From 4.5.0 until 4.5.10 and 4.6.2, in jupyterlab/extensions/manager.py and jupyterlab/extensions/pypi.py, JupyterLab\u0027s PyPI extension manager enforces blocked_extensions_uris by comparing requested install names to blocklist entries with custom normalization that is weaker than PyPI package-name canonicalization. An authenticated user can request a PyPI-equivalent spelling such as JupyterLab.Git for a blocklisted package such as jupyterlab-git, and JupyterLab accepts the install request even though pip resolves the variant to the same package. Security impact requires an allowlist or blocklist intended to restrict package installation, the PyPI Extension Manager, and kernels and terminals that are disabled or delegated to remote hosts. The bypass lets an authenticated user install a prohibited extension, defeat integrity restrictions, and affect availability without gaining new read access. This issue is fixed in versions 4.5.10 and 4.6.2."
}
],
"metrics": [
{
"cvssV4_0": {
"attackComplexity": "LOW",
"attackRequirements": "PRESENT",
"attackVector": "NETWORK",
"baseScore": 6.1,
"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:L/SC:N/SI:N/SA:N",
"version": "4.0",
"vulnAvailabilityImpact": "LOW",
"vulnConfidentialityImpact": "LOW",
"vulnIntegrityImpact": "HIGH"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-178",
"description": "CWE-178: Improper Handling of Case Sensitivity",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-180",
"description": "CWE-180: Incorrect Behavior Order: Validate Before Canonicalize",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-13T22:04:26.603Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/jupyterlab/jupyterlab/security/advisories/GHSA-89vp-jrxv-24w8",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/jupyterlab/jupyterlab/security/advisories/GHSA-89vp-jrxv-24w8"
},
{
"name": "https://github.com/jupyterlab/jupyterlab/pull/19184",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/jupyterlab/jupyterlab/pull/19184"
},
{
"name": "https://github.com/jupyterlab/jupyterlab/pull/19185",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/jupyterlab/jupyterlab/pull/19185"
},
{
"name": "https://github.com/jupyterlab/jupyterlab/pull/19186",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/jupyterlab/jupyterlab/pull/19186"
},
{
"name": "https://github.com/jupyterlab/jupyterlab/commit/9365f020baec5221deaf11535ed554c06637c999",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/jupyterlab/jupyterlab/commit/9365f020baec5221deaf11535ed554c06637c999"
},
{
"name": "https://github.com/jupyterlab/jupyterlab/commit/be9303f5bcd5308eaeae953c5a3c903046682c2c",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/jupyterlab/jupyterlab/commit/be9303f5bcd5308eaeae953c5a3c903046682c2c"
},
{
"name": "https://github.com/jupyterlab/jupyterlab/commit/f1beab4a2027af4719d6edc07d52d6cf5a39a432",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/jupyterlab/jupyterlab/commit/f1beab4a2027af4719d6edc07d52d6cf5a39a432"
},
{
"name": "https://github.com/jupyterlab/jupyterlab/releases/tag/v4.5.10",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/jupyterlab/jupyterlab/releases/tag/v4.5.10"
},
{
"name": "https://github.com/jupyterlab/jupyterlab/releases/tag/v4.6.2",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/jupyterlab/jupyterlab/releases/tag/v4.6.2"
},
{
"name": "https://github.com/jupyterlab/jupyterlab/releases/tag/v4.7.0a1",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/jupyterlab/jupyterlab/releases/tag/v4.7.0a1"
}
],
"source": {
"advisory": "GHSA-89vp-jrxv-24w8",
"discovery": "UNKNOWN"
},
"title": "jupyterlab: PyPI extension blocklist package-name canonicalization bypass"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-73416",
"datePublished": "2026-08-13T22:04:26.603Z",
"dateReserved": "2026-08-12T14:32:11.795Z",
"dateUpdated": "2026-08-17T17:17:59.508Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"vulnrichment": {
"containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-73416\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-08-17T17:16:18.061380Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-08-17T17:17:52.718Z\"}}], \"cna\": {\"title\": \"jupyterlab: PyPI extension blocklist package-name canonicalization bypass\", \"source\": {\"advisory\": \"GHSA-89vp-jrxv-24w8\", \"discovery\": \"UNKNOWN\"}, \"metrics\": [{\"cvssV4_0\": {\"version\": \"4.0\", \"baseScore\": 6.1, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:H/VA:L/SC:N/SI:N/SA:N\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"attackRequirements\": \"PRESENT\", \"privilegesRequired\": \"LOW\", \"subIntegrityImpact\": \"NONE\", \"vulnIntegrityImpact\": \"HIGH\", \"subAvailabilityImpact\": \"NONE\", \"vulnAvailabilityImpact\": \"LOW\", \"subConfidentialityImpact\": \"NONE\", \"vulnConfidentialityImpact\": \"LOW\"}}], \"affected\": [{\"vendor\": \"jupyterlab\", \"product\": \"jupyterlab\", \"versions\": [{\"status\": \"affected\", \"version\": \"\u003e= 4.5.0, \u003c 4.5.10\"}, {\"status\": \"affected\", \"version\": \"\u003e= 4.6.0, \u003c 4.6.2\"}]}], \"references\": [{\"url\": \"https://github.com/jupyterlab/jupyterlab/security/advisories/GHSA-89vp-jrxv-24w8\", \"name\": \"https://github.com/jupyterlab/jupyterlab/security/advisories/GHSA-89vp-jrxv-24w8\", \"tags\": [\"x_refsource_CONFIRM\"]}, {\"url\": \"https://github.com/jupyterlab/jupyterlab/pull/19184\", \"name\": \"https://github.com/jupyterlab/jupyterlab/pull/19184\", \"tags\": [\"x_refsource_MISC\"]}, {\"url\": \"https://github.com/jupyterlab/jupyterlab/pull/19185\", \"name\": \"https://github.com/jupyterlab/jupyterlab/pull/19185\", \"tags\": [\"x_refsource_MISC\"]}, {\"url\": \"https://github.com/jupyterlab/jupyterlab/pull/19186\", \"name\": \"https://github.com/jupyterlab/jupyterlab/pull/19186\", \"tags\": [\"x_refsource_MISC\"]}, {\"url\": \"https://github.com/jupyterlab/jupyterlab/commit/9365f020baec5221deaf11535ed554c06637c999\", \"name\": \"https://github.com/jupyterlab/jupyterlab/commit/9365f020baec5221deaf11535ed554c06637c999\", \"tags\": [\"x_refsource_MISC\"]}, {\"url\": \"https://github.com/jupyterlab/jupyterlab/commit/be9303f5bcd5308eaeae953c5a3c903046682c2c\", \"name\": \"https://github.com/jupyterlab/jupyterlab/commit/be9303f5bcd5308eaeae953c5a3c903046682c2c\", \"tags\": [\"x_refsource_MISC\"]}, {\"url\": \"https://github.com/jupyterlab/jupyterlab/commit/f1beab4a2027af4719d6edc07d52d6cf5a39a432\", \"name\": \"https://github.com/jupyterlab/jupyterlab/commit/f1beab4a2027af4719d6edc07d52d6cf5a39a432\", \"tags\": [\"x_refsource_MISC\"]}, {\"url\": \"https://github.com/jupyterlab/jupyterlab/releases/tag/v4.5.10\", \"name\": \"https://github.com/jupyterlab/jupyterlab/releases/tag/v4.5.10\", \"tags\": [\"x_refsource_MISC\"]}, {\"url\": \"https://github.com/jupyterlab/jupyterlab/releases/tag/v4.6.2\", \"name\": \"https://github.com/jupyterlab/jupyterlab/releases/tag/v4.6.2\", \"tags\": [\"x_refsource_MISC\"]}, {\"url\": \"https://github.com/jupyterlab/jupyterlab/releases/tag/v4.7.0a1\", \"name\": \"https://github.com/jupyterlab/jupyterlab/releases/tag/v4.7.0a1\", \"tags\": [\"x_refsource_MISC\"]}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"jupyterlab is an extensible environment for interactive and reproducible computing, based on the Jupyter Notebook Architecture. From 4.5.0 until 4.5.10 and 4.6.2, in jupyterlab/extensions/manager.py and jupyterlab/extensions/pypi.py, JupyterLab\u0027s PyPI extension manager enforces blocked_extensions_uris by comparing requested install names to blocklist entries with custom normalization that is weaker than PyPI package-name canonicalization. An authenticated user can request a PyPI-equivalent spelling such as JupyterLab.Git for a blocklisted package such as jupyterlab-git, and JupyterLab accepts the install request even though pip resolves the variant to the same package. Security impact requires an allowlist or blocklist intended to restrict package installation, the PyPI Extension Manager, and kernels and terminals that are disabled or delegated to remote hosts. The bypass lets an authenticated user install a prohibited extension, defeat integrity restrictions, and affect availability without gaining new read access. This issue is fixed in versions 4.5.10 and 4.6.2.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-178\", \"description\": \"CWE-178: Improper Handling of Case Sensitivity\"}]}, {\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-180\", \"description\": \"CWE-180: Incorrect Behavior Order: Validate Before Canonicalize\"}]}], \"providerMetadata\": {\"orgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"shortName\": \"GitHub_M\", \"dateUpdated\": \"2026-08-13T22:04:26.603Z\"}}}",
"cveMetadata": "{\"cveId\": \"CVE-2026-73416\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-08-17T17:17:59.508Z\", \"dateReserved\": \"2026-08-12T14:32:11.795Z\", \"assignerOrgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"datePublished\": \"2026-08-13T22:04:26.603Z\", \"assignerShortName\": \"GitHub_M\"}",
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
Loading…
Loading…
Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
Loading…
Loading…