Medium
cross-site inclusion (XSSI) of files in jupyter-server
Type: advisorySources: OSV
jupyter-server is the backend for Jupyter web applications. Improper cross-site credential checks on `/files/` URLs could allow exposure of certain file contents, or accessing files when opening untrusted files via "Open image in new tab". This issue has been addressed in commit `87a49272728` which has been included in release `2.7.2`. Users are advised to upgrade. Users unable to upgrade may use the lower performance `--ContentsManager.files_handler_class=jupyter_server.files.handlers.FilesHandler`, which implements the correct checks.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2023-40170
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 4 Nov 2026, 17:02 UTC · Revision 1
Source evidence
cross-site inclusion (XSSI) of files in jupyter-server
core-osv · Original sourcePublished 28 Aug 2023, 20:01 UTC
jupyter-server is the backend for Jupyter web applications. Improper cross-site credential checks on `/files/` URLs could allow exposure of certain file contents, or accessing files when opening untrusted files via "Open image in new tab". This issue has been addressed in commit `87a49272728` which has been included in release `2.7.2`. Users are advised to upgrade. Users unable to upgrade may use the lower performance `--ContentsManager.files_handler_class=jupyter_server.files.handlers.FilesHandler`, which implements the correct checks.
osv:CVE-2023-40170
Complete source record
{
"id": "f02b61e48512aa2266aed46ff82ff8b09e8b3d4cfd570c205bdbe6de2f6d6e8e",
"url": "https://osv.dev/vulnerability/CVE-2023-40170",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "cross-site inclusion (XSSI) of files in jupyter-server",
"summary": "jupyter-server is the backend for Jupyter web applications. Improper cross-site credential checks on `/files/` URLs could allow exposure of certain file contents, or accessing files when opening untrusted files via \"Open image in new tab\". This issue has been addressed in commit `87a49272728` which has been included in release `2.7.2`. Users are advised to upgrade. Users unable to upgrade may use the lower performance `--ContentsManager.files_handler_class=jupyter_server.files.handlers.FilesHandler`, which implements the correct checks.",
"evidence": "osv:CVE-2023-40170",
"products": [],
"severity": "medium",
"structured": {
"id": "CVE-2023-40170",
"aliases": [
"CVE-2023-40170",
"GHSA-64x5-55rw-9974",
"PYSEC-2023-157"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/jupyter-server/jupyter_server",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"fixed": "5a8a47f5ba674d0f758a91cca08e2a9c6eacf224"
},
{
"fixed": "87a4927272819f0b1cae1afa4c8c86ee2da002fd"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:jupyter:jupyter_server:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "0"
},
{
"fixed": "2.7.2"
}
],
"source": "CPE_RANGE"
},
{
"range": [
{
"fixed": "87a4927272819f0b1cae1afa4c8c86ee2da002fd"
}
],
"source": "REFERENCES_COMMIT"
}
]
}
}
],
"versions": [
"v2.7.1",
"v2.7.0",
"v2.6.0",
"v2.5.0",
"v2.4.0",
"v2.3.0",
"v2.2.1",
"v2.2.0",
"v2.1.0",
"v2.0.7",
"v2.0.6",
"v2.0.5",
"v2.0.4",
"v2.0.3",
"v2.0.2",
"v2.0.1",
"v2.0.0",
"v2.0.0rc8",
"v2.0.0rc7",
"v2.0.0rc6",
"v2.0.0rc5",
"v2.0.0rc4",
"v2.0.0rc3",
"v2.0.0rc2",
"v2.0.0rc1",
"v2.0.0rc0",
"v2.0.0b1",
"v2.0.0b0",
"v2.0.0a2",
"v2.0.0a1",
"v2.0.0a0",
"v1.16.0",
"v1.15.6",
"v1.15.5",
"v1.15.4",
"v1.15.3",
"v1.15.2",
"v1.15.1",
"v1.15.0",
"v1.13.5",
"v1.13.4",
"v1.13.3",
"v1.13.2",
"v1.13.1",
"v1.13.0",
"v1.12.1",
"v1.12.0",
"v1.11.2",
"v1.11.1",
"v1.11.0",
"v1.10.2",
"v1.10.1",
"v1.10.0",
"v1.9.0",
"v1.8.0",
"v1.7.0",
"v1.7.0a2",
"v1.7.0a1",
"v1.7.0a0",
"v1.6.4",
"v1.6.3",
"v1.6.2",
"1.6.1",
"1.6.0",
"1.5.1",
"1.5.0",
"1.4.1",
"1.4.0",
"1.3.0",
"1.2.3",
"1.2.2",
"1.2.1",
"1.2.0",
"1.1.4",
"1.1.3",
"1.1.2",
"1.1.1",
"1.1.0",
"1.0.5",
"1.0.4",
"1.0.3",
"1.0.2",
"1.0.1",
"1.0.0",
"1.0.0rc16",
"1.0.0rc15",
"1.0.0rc14",
"1.0.0rc13",
"1.0.0rc12",
"1.0.0rc11",
"1.0.0rc10",
"1.0.0rc9",
"1.0.0rc8",
"1.0.0rc7",
"1.0.0rc6",
"1.0.0rc5",
"1.0.0rc4",
"1.0.0rc3",
"1.0.0rc2",
"1.0.0rc1",
"0.3.0",
"0.2.0",
"0.1.1",
"0.1.0",
"0.0.5",
"0.0.4",
"0.0.3",
"0.0.2",
"0.0.1"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-40170.json"
}
}
],
"modified": "2026-10-28T02:30:37.770428541Z",
"provider": "osv",
"references": [
"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/NRP7DNZYVOIA4ZB3U3ZWKTFZEPYWNGCQ/",
"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/XDKQAWQN6SQTOVACZNXYKEHWQXGG4DOF/",
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/40xxx/CVE-2023-40170.json",
"https://github.com/jupyter-server/jupyter_server/security/advisories/GHSA-64x5-55rw-9974",
"https://nvd.nist.gov/vuln/detail/CVE-2023-40170",
"https://github.com/jupyter-server/jupyter_server/commit/87a4927272819f0b1cae1afa4c8c86ee2da002fd"
],
"provider_metadata": {
"cwe_ids": [
"CWE-284",
"CWE-306"
],
"cna_assigner": "GitHub_M",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/40xxx/CVE-2023-40170.json"
}
},
"related_cves": [
{
"value": "CVE-2023-40170",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 505103,
"published_at": "2023-08-28T20:01:57.156+00:00"
}