MediumVulnerability

CVE-2026-7869: IBM Langflow OSS path traversal in Knowledge Bases API

Source: NVD(opens in a new tab)
Identifier: CVE-2026-7869
Published: August 5, 2026
Record updated: October 9, 2026

Known exploitation: Not listed in the CISA Known Exploited Vulnerabilities catalog at the last check.
EPSS: 0.3%

Summary

IBM Langflow OSS versions 1.0.0 through 1.10.3 contain a path traversal flaw (CWE-22) in the Knowledge Bases API endpoint POST /api/v1/knowledge_bases. User-supplied knowledge base names are used directly to build file paths without sanitization or containment checks. An authenticated attacker can create directories and write files anywhere on the server's filesystem.

Mitigation

The source does not state a fix yet. Check the original advisory for updates.

Details

Scores and exploitation

CVSS score: 5.4(medium)
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Attack vector: network
Attack complexity: low
Privileges required: low
User interaction: none
EPSS: 0.3%Estimated probability that this CVE is exploited in the next 30 days, from the FIRST Exploit Prediction Scoring System. Read on November 9, 2026.
Disclosure date: August 5, 2026

Weaknesses and techniques

Weakness (CWE): CWE-22
Attack pattern (CAPEC): CAPEC-126

Classification

Attack type: Other
Attack sophistication: Trivial
AI component targeted: Framework
Impact: Integrity,
Availability
Labels: security

How this record was produced

Summaries, mitigations and labels on this page are generated automatically from the source. The linked source is authoritative. The source gives this advisory a description and no title, so the title above is a headline generated from the source text.

Original source: https://nvd.nist.gov/vuln/detail/CVE-2026-7869

First tracked: August 5, 2026 at 08:08 PM ET, from NVD/CVE Database

Classifier: claude-haiku-5-5, prompt v4

Classifier confidence: 90% (self-assessed)

Summary

Mitigation

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