What is CVE-2026-7658?

CVE-2026-7658 is a medium-severity vulnerability in IBM Langflow Oss, classified under Path Traversal. CVSS score: 6.5/10. Published 2026-08-05.

How severe is CVE-2026-7658?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Path Traversal in IBM Langflow Oss

CVE-2026-7658

IBM Langflow OSS 1.0.0 through 1.10.3 does not properly validate the username field, allowing attackers to inject path traversal sequences and bypass containment checks. This enables multiple severe impacts, including arbitrary directory deletion, cross-tenant data destruction, and JWT signing key deletion leading to session invalidation.

Vulnerability class: Path Traversal (Directory Traversal)

EPSS: 0.003 (26.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N.

Affected products

Ibm Langflow Oss — versions 1.0.0
Langflow

Weakness classification (CWE)

CWE-22 — Path Traversal

References

psirt@us.ibm.com (vendor-advisory, patch, Vendor Advisory)

Frequently asked questions

What is CVE-2026-7658?: CVE-2026-7658 is a medium-severity vulnerability in IBM Langflow Oss, classified under Path Traversal. CVSS score: 6.5/10. Published 2026-08-05.
How severe is CVE-2026-7658?: Medium severity. CVSS v3 base score is 6.5 out of 10.