JumpServer: KoKo Web Terminal SFTP Path Traversal on Authorized Asset
JumpServer is an open source bastion host and an operation and maintenance security audit system. From 4.8.0 until 4.10.17, an authenticated user with SFTP permission to an authorized asset can submit crafted traversal paths through the KoKo Web Terminal SFTP feature, causing AssetDir.GetRealPath() in pkg/srvconn/sftp_asset.go to resolve paths outside the intended SFTP root and permit read, list, write, rename, or delete operations under the configured backend account on that asset. This issue is fixed in version 4.10.17.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2026-54336
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 3 Nov 2026, 07:32 UTC · Revision 1
Source evidence
JumpServer: KoKo Web Terminal SFTP Path Traversal on Authorized Asset
core-osv · Original sourcePublished 17 Aug 2026, 21:01 UTC
JumpServer is an open source bastion host and an operation and maintenance security audit system. From 4.8.0 until 4.10.17, an authenticated user with SFTP permission to an authorized asset can submit crafted traversal paths through the KoKo Web Terminal SFTP feature, causing AssetDir.GetRealPath() in pkg/srvconn/sftp_asset.go to resolve paths outside the intended SFTP root and permit read, list, write, rename, or delete operations under the configured backend account on that asset. This issue is fixed in version 4.10.17.
osv:CVE-2026-54336
Complete source record
{
"id": "d47fa3c0be1f0289432bdeaf0f3ad37d98bd777826b42dbc06d2313b803f2189",
"url": "https://osv.dev/vulnerability/CVE-2026-54336",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "JumpServer: KoKo Web Terminal SFTP Path Traversal on Authorized Asset",
"summary": "JumpServer is an open source bastion host and an operation and maintenance security audit system. From 4.8.0 until 4.10.17, an authenticated user with SFTP permission to an authorized asset can submit crafted traversal paths through the KoKo Web Terminal SFTP feature, causing AssetDir.GetRealPath() in pkg/srvconn/sftp_asset.go to resolve paths outside the intended SFTP root and permit read, list, write, rename, or delete operations under the configured backend account on that asset. This issue is fixed in version 4.10.17.",
"evidence": "osv:CVE-2026-54336",
"products": [],
"severity": "medium",
"structured": {
"id": "CVE-2026-54336",
"aliases": [
"CVE-2026-54336",
"GHSA-x6rg-36j6-76vr"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/jumpserver/jumpserver",
"type": "GIT",
"events": [
{
"introduced": "6d66ba528874b7758c8745b6bbe0ebed641fe1d4"
},
{
"fixed": "c92f58554e2bd6651a91590a4ab2517cf77d6bf1"
}
],
"database_specific": {
"extracted_events": [
{
"range": [
{
"introduced": "4.8.0"
},
{
"fixed": "4.10.17"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StringRangeExpression"
},
{
"range": [
{
"introduced": "0"
},
{
"fixed": "4.10.17"
}
],
"source": "DESCRIPTION"
}
]
}
},
{
"repo": "https://github.com/jumpserver/koko",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"fixed": "02fabebe27dacce89114fba122c667a946fd12ea"
},
{
"fixed": "e8234800ffaa46fec7e1e0350ec1a0f6345057da"
}
],
"database_specific": {
"extracted_events": [
{
"range": [
{
"fixed": "02fabebe27dacce89114fba122c667a946fd12ea"
}
],
"source": "REFERENCES_COMMIT"
},
{
"range": [
{
"fixed": "e8234800ffaa46fec7e1e0350ec1a0f6345057da"
}
],
"source": "REFERENCES_TAG",
"original_tag": "v4.10.17"
}
]
}
}
],
"versions": [
"v4.10.16",
"v4.10.15",
"v4.10.14",
"v4.10.13",
"v4.10.11",
"v4.10.10",
"v4.10.8",
"v4.10.6",
"v4.10.5",
"v4.10.4",
"v4.10.2",
"v4.10.0",
"v4.9.0",
"v4.8.1",
"v4.8.0",
"v4.7.0",
"v4.6.0",
"v4.5.0",
"v4.4.1",
"v4.3.1",
"v4.3.0",
"v4.1.0",
"v4.0.1",
"v3.4.0",
"v2.23.0",
"v2.22.4",
"v2.22.3",
"v2.22.1",
"v2.22.0",
"v2.21.0",
"v2.20.1",
"v2.20.0",
"v2.19.0",
"v2.18.0",
"v2.17.0",
"v2.16.0",
"v2.15.4",
"v2.15.3",
"v2.15.2",
"v2.15.1",
"v2.15.0",
"v2.14.0",
"v2.13.2",
"v2.13.1",
"v2.13.0",
"v2.12.0",
"v2.11.1",
"v2.11.0",
"v2.10.3",
"v2.10.2",
"v2.10.1",
"v2.10.0",
"v2.9.2",
"v2.9.1",
"v2.9.0",
"v2.8.0",
"v2.7.0",
"v2.6.0",
"v2.5.0",
"v2.4.1",
"v2.4.0",
"v2.3.0",
"v2.2.0",
"v2.1.0",
"1.5.9",
"2.0.1",
"2.0.0",
"1.5.8",
"1.5.6",
"1.5.5",
"1.5.3",
"1.5.1"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-54336.json"
}
}
],
"modified": "2026-10-28T02:30:27.076734376Z",
"provider": "osv",
"references": [
"https://github.com/jumpserver/koko/releases/tag/v4.10.17",
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54336.json",
"https://github.com/jumpserver/jumpserver/security/advisories/GHSA-x6rg-36j6-76vr",
"https://nvd.nist.gov/vuln/detail/CVE-2026-54336",
"https://github.com/jumpserver/koko/commit/02fabebe27dacce89114fba122c667a946fd12ea"
],
"provider_metadata": {
"cwe_ids": [
"CWE-22"
],
"cna_assigner": "GitHub_M",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54336.json"
}
},
"related_cves": [
{
"value": "CVE-2026-54336",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 493391,
"published_at": "2026-08-17T21:01:48.667+00:00"
}