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CVE-2026-42048

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 (DELETE /api/v1/knowledge_bases). This occurs because user-supplied knowledge base names are concatenated directly into file paths without proper sanitization or boundary validation. An authenticated attacker can exploit this flaw to delete arbitrary directories anywhere on the server's filesystem, leading to data loss and potential se
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:ff6b9773e86f896b87ef5687a3b6222c4cb0d0ca35998185b78c3ab91cd80fd3
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

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:a91d1eed06ecc1f2b3fe13514c659c7bd2c29800db494bd9d1d7f349cae021f7 · sha256:db366bfaec0dc0cb… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":9.6,"baseSeverity":"CRITICAL","confidentialityImpact":"NONE","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:a91d1eed06ecc1f2b3fe13514c659c7bd2c29800db494bd9d1d7f349cae021f7 · sha256:db366bfaec0dc0cb… · /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:a91d1eed06ecc1f2b3fe13514c659c7bd2c29800db494bd9d1d7f349cae021f7 · sha256:db366bfaec0dc0cb… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions
{"tags":["exploit"],"url":"https://github.com/langflow-ai/langflow/security/advisories/GHSA-9whx-c884-c68q"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:a91d1eed06ecc1f2b3fe13514c659c7bd2c29800db494bd9d1d7f349cae021f7 · sha256:db366bfaec0dc0cb… · /containers/adp/0/references/0
{"name":"https://github.com/langflow-ai/langflow/security/advisories/GHSA-9whx-c884-c68q","tags":["x_refsource_CONFIRM"],"url":"https://github.com/langflow-ai/langflow/security/advisories/GHSA-9whx-c884-c68q"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:a91d1eed06ecc1f2b3fe13514c659c7bd2c29800db494bd9d1d7f349cae021f7 · sha256:db366bfaec0dc0cb… · /containers/cna/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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