Medium
Kestra task inputFiles accepts traversal filenames for worker file writes
Type: advisorySources: OSV
Kestra is an open-source, event-driven orchestration platform. Prior to versions 1.3.19, 1.2.19, 1.1.19, and 1.0.43, Kestra task `inputFiles` writes rendered file names directly under the task working directory. When a flow forwards untrusted execution or webhook data into an `inputFiles` file name, a caller can use `../` path segments to create or overwrite files outside that task working directory on the worker filesystem. Versions 1.3.19, 1.2.19, 1.1.19, and 1.0.43 patch the issue.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2026-48129
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 3 Nov 2026, 10:27 UTC · Revision 1
Source evidence
Kestra task inputFiles accepts traversal filenames for worker file writes
core-osv · Original sourcePublished 19 Jun 2026, 20:16 UTC
Kestra is an open-source, event-driven orchestration platform. Prior to versions 1.3.19, 1.2.19, 1.1.19, and 1.0.43, Kestra task `inputFiles` writes rendered file names directly under the task working directory. When a flow forwards untrusted execution or webhook data into an `inputFiles` file name, a caller can use `../` path segments to create or overwrite files outside that task working directory on the worker filesystem. Versions 1.3.19, 1.2.19, 1.1.19, and 1.0.43 patch the issue.
osv:CVE-2026-48129
Complete source record
{
"id": "4694ede393857e5a0a27d59388f6e7a048590c188ea1719bf8c98c06964c4035",
"url": "https://osv.dev/vulnerability/CVE-2026-48129",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Kestra task inputFiles accepts traversal filenames for worker file writes",
"summary": "Kestra is an open-source, event-driven orchestration platform. Prior to versions 1.3.19, 1.2.19, 1.1.19, and 1.0.43, Kestra task `inputFiles` writes rendered file names directly under the task working directory. When a flow forwards untrusted execution or webhook data into an `inputFiles` file name, a caller can use `../` path segments to create or overwrite files outside that task working directory on the worker filesystem. Versions 1.3.19, 1.2.19, 1.1.19, and 1.0.43 patch the issue.",
"evidence": "osv:CVE-2026-48129",
"products": [],
"severity": "medium",
"structured": {
"id": "CVE-2026-48129",
"aliases": [
"CVE-2026-48129",
"GHSA-q3fw-mvgv-pjr2"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:L"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/kestra-io/kestra",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"fixed": "27c0064c05c37f604b97f667dc15f06113785a13"
},
{
"introduced": "1e670b5e7e92f89533ee17d564263578b0d5ec8c"
},
{
"fixed": "cd1f5f766f3aa23e9a17542860c18edcf131cfef"
},
{
"introduced": "851cc74fcda276eae781b4faccee1c1f291af773"
},
{
"fixed": "8bc838b9649c0325ae2642f5a89867b48ea3443c"
},
{
"introduced": "ca026b3b1d41cfc8a396023c8a13940b4142dfb1"
},
{
"fixed": "82cb2d921d9800179597ec324a5fd9df593b644b"
}
],
"database_specific": {
"extracted_events": [
{
"range": [
{
"introduced": "0"
},
{
"fixed": "1.0.43"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StringRangeExpression"
},
{
"range": [
{
"introduced": "1.1.0"
},
{
"fixed": "1.1.19"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StringRangeExpression"
},
{
"range": [
{
"introduced": "1.2.0"
},
{
"fixed": "1.2.19"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StringRangeExpression"
},
{
"range": [
{
"introduced": "1.3.0"
},
{
"fixed": "1.3.19"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StringRangeExpression"
}
]
}
}
],
"versions": [
"v1.1.18",
"v1.0.42",
"v1.3.18",
"v1.2.18",
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"v1.2.14",
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"v1.3.9",
"v1.0.35",
"v1.3.8",
"v1.2.13",
"v1.3.7",
"v1.2.12",
"v1.0.34",
"v1.3.6",
"v1.3.5",
"v1.3.4",
"v1.2.11",
"v1.0.33",
"v1.3.3",
"v1.1.16",
"v1.2.10",
"v1.2.9",
"v1.3.2",
"v1.0.32",
"v1.0.31",
"v1.3.1",
"v1.0.30",
"v1.3.0",
"v1.0.29",
"v1.2.8",
"v1.2.7",
"v1.0.28",
"v1.2.6",
"v1.2.5",
"v1.0.27",
"v1.2.4",
"v1.0.26",
"v1.2.3",
"v1.0.25",
"v1.1.15",
"v1.2.2",
"v1.1.14",
"v1.2.1",
"v1.0.24",
"v1.0.23",
"v1.0.22",
"v1.0.21",
"v1.2.0",
"v1.1.13",
"v1.0.20",
"v1.1.12",
"v1.0.19",
"v1.1.11",
"v1.1.10",
"v1.0.18",
"v1.1.9",
"v1.0.17",
"v1.1.8",
"v1.0.16",
"v1.1.7",
"v1.1.6",
"v1.0.15",
"v1.0.14",
"v1.1.5",
"v1.0.13",
"v1.1.4",
"v1.0.12",
"v1.1.3",
"v1.0.11",
"v1.1.2",
"v1.1.1",
"v1.1.0",
"v1.0.10",
"v1.0.9",
"v1.0.8",
"v1.0.7",
"v1.0.6",
"v1.0.5",
"v1.0.4",
"v1.0.3",
"v1.0.2",
"v1.0.1",
"v1.0.0",
"v0.0.1234",
"v0.19.0",
"v0.9.1",
"v0.9.0",
"v0.8.1",
"v0.8.0",
"v0.7.1",
"v0.7.0"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-48129.json"
}
}
],
"modified": "2026-10-28T02:30:27.917482157Z",
"provider": "osv",
"references": [
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/48xxx/CVE-2026-48129.json",
"https://github.com/kestra-io/kestra/security/advisories/GHSA-q3fw-mvgv-pjr2",
"https://nvd.nist.gov/vuln/detail/CVE-2026-48129"
],
"provider_metadata": {
"cwe_ids": [
"CWE-22"
],
"cna_assigner": "GitHub_M",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/48xxx/CVE-2026-48129.json"
}
},
"related_cves": [
{
"value": "CVE-2026-48129",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 494528,
"published_at": "2026-06-19T20:16:24.043+00:00"
}