CVE Explorer

CVE-2026-42867

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.

Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:ef76d754db2cb88aa3b1d04d2d417eb004e4f18afb88a696eaeabf06f20d5435

Known exploited

Not asserted

Disputed

Stale source

Conflicts

Affected products and versions

1 source assertion

{"product":"langflow","vendor":"langflow-ai","versions":[{"status":"affected","version":"< 1.9.0"}]}

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:731c52cc58f732b0591cad377d3dbfb6a1f76403efeafd94e4451e880cd39c1f · sha256:a5d3bd2e714d58fa… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion

{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":6.5,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L","version":"3.1"},"metric_type":"cvssV3_1"}

cve_program_cvelist_v5cvss
urn:baitaphish:normalized-source-record:v2:731c52cc58f732b0591cad377d3dbfb6a1f76403efeafd94e4451e880cd39c1f · sha256:a5d3bd2e714d58fa… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion

{"cweId":"CWE-22","description":"CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:731c52cc58f732b0591cad377d3dbfb6a1f76403efeafd94e4451e880cd39c1f · sha256:a5d3bd2e714d58fa… · /containers/cna/problemTypes/0/descriptions/0

Source references

3 source assertions

{"name":"https://github.com/langflow-ai/langflow/pull/12337","tags":["x_refsource_MISC"],"url":"https://github.com/langflow-ai/langflow/pull/12337"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:731c52cc58f732b0591cad377d3dbfb6a1f76403efeafd94e4451e880cd39c1f · sha256:a5d3bd2e714d58fa… · /containers/cna/references/1

{"name":"https://github.com/langflow-ai/langflow/security/advisories/GHSA-79ph-745m-6wxq","tags":["x_refsource_CONFIRM"],"url":"https://github.com/langflow-ai/langflow/security/advisories/GHSA-79ph-745m-6wxq"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:731c52cc58f732b0591cad377d3dbfb6a1f76403efeafd94e4451e880cd39c1f · sha256:a5d3bd2e714d58fa… · /containers/cna/references/0

{"tags":["exploit"],"url":"https://github.com/langflow-ai/langflow/security/advisories/GHSA-79ph-745m-6wxq"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:731c52cc58f732b0591cad377d3dbfb6a1f76403efeafd94e4451e880cd39c1f · sha256:a5d3bd2e714d58fa… · /containers/adp/0/references/0

Attribution and limitations

CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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