CVE-2026-42867

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Source

https://cve.org/CVERecord?id=CVE-2026-42867

Import Source

https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-42867.json

JSON Data

https://api.osv.dev/v1/vulns/CVE-2026-42867

Aliases

Published

2026-06-23T16:29:11.848Z

Modified

2026-07-15T01:49:19.302570654Z

Severity

6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L CVSS Calculator

Summary

Langflow: Path Traversal in Knowledge Bases API via Creation Endpoint

Details

Langflow is a tool for building and deploying AI-powered agents and workflows. Prior to 1.9.0, Langflow is vulnerable to Path Traversal in the Knowledge Bases API (POST /api/v1/knowledge_bases). This occurs because user-supplied knowledge base names are used directly to create file paths without proper sanitization or containment checks. An authenticated attacker can exploit this flaw to create directories and write files anywhere on the server's filesystem. This vulnerability is fixed in 1.9.0.

Database specific

{
    "cwe_ids": [
        "CWE-22"
    ],
    "cna_assigner": "GitHub_M",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42867.json"
}

References

Affected packages

Git / github.com/langflow-ai/langflow

Affected ranges

Type

GIT

Repo

https://github.com/langflow-ai/langflow

Events

Introduced

Fixed

a47f2ad17eb662e940c550cfccb64a87dddd7e0b

Database specific

{
    "source": [
        "AFFECTED_FIELD",
        "CPE_RANGE"
    ],
    "cpe": "cpe:2.3:a:langflow:langflow:*:*:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "1.9.0"
        }
    ]
}

Affected versions

1.*

1.1.2

1.1.3

1.1.4

1.2.0

1.3.0

1.3.1

1.3.2

1.3.3

1.3.4

1.4.0

1.4.1

1.4.2

1.5.0.post1

1.8.0.rc0

1.8.0.rc1

1.8.0.rc2

1.8.0.rc3

1.8.0.rc4

1.8.0.rc5

1.8.0.rc6

1.8.1

v0.*

v0.0.31

v0.0.69

v0.0.70

v0.0.71

v0.0.72

v0.0.73

v0.0.74

v0.0.75

v0.0.76

v0.0.77

v0.0.78

v0.0.79

v0.0.80

v0.0.81

v0.0.82

v0.0.83

v0.0.84

v0.0.85

v0.0.86

v0.0.87

v0.0.88

v0.0.89

v0.1.0

v0.1.2

v0.1.3

v0.1.4

v0.1.5

v0.1.6

v0.1.7

v0.2.0

v0.2.1

v0.2.10

v0.2.11

v0.2.12

v0.2.13

v0.2.2

v0.2.3

v0.2.4

v0.2.5

v0.2.6

v0.2.7

v0.2.8

v0.2.9

v0.3.0

v0.3.1

v0.3.2

v0.3.3

v0.3.4

v0.4.0

v0.4.1

v0.4.10

v0.4.11

v0.4.12

v0.4.14

v0.4.15

v0.4.16

v0.4.17

v0.4.18

v0.4.19

v0.4.2

v0.4.20

v0.4.21

v0.4.3

v0.4.4

v0.4.5

v0.4.6

v0.4.7

v0.4.8

v0.4.9

v0.5.0

v0.5.0a0

v0.5.0a1

v0.5.0a2

v0.5.0a3

v0.5.0a4

v0.5.0a5

v0.5.0a6

v0.5.0b0

v0.5.0b2

v0.5.0b3

v0.5.0b4

v0.5.0b5

v0.5.0b6

v0.5.1

v0.5.10

v0.5.11

v0.5.12

v0.5.2

v0.5.3

v0.5.4

v0.5.5

v0.5.6

v0.5.7

v0.5.8

v0.5.9

v0.6.0

v0.6.0a0

v0.6.0rc1

v0.6.1

v0.6.10

v0.6.11

v0.6.12

v0.6.13

v0.6.14

v0.6.15

v0.6.16

v0.6.17

v0.6.18

v0.6.19

v0.6.2

v0.6.3

v0.6.3a0

v0.6.3a1

v0.6.3a2

v0.6.3a3

v0.6.3a4

v0.6.3a5

v0.6.3a6

v0.6.4

v0.6.5

v0.6.6

v0.6.7

v0.6.8

v0.6.9

v1.*

v1.0.10

v1.0.11

v1.0.12

v1.0.13

v1.0.14

v1.0.15

v1.0.16

v1.0.17

v1.0.18

v1.0.19

v1.0.2

v1.0.3

v1.0.4

v1.0.5

v1.0.6

v1.0.7

v1.0.8

v1.0.9

v1.1.0

v1.1.1

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-42867.json"