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CVE-2026-18899

HighPublished

Langflow is affected by multiple authentication bypass, path traversal, authorization, and server-side request forgery vulnerabilities

Published: Aug 28, 2026
Updated: Sep 1, 2026
Assigning CNA: ibm
Evidence observed: Sep 27, 2026

Primary CVSS

7.5/ 10High

nvd · CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS probability estimate

0.5%

Low · next 30 days

Percentile: 39.2%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

IBM Langflow OSS 1.0.0 through 1.11.1 could allow a remote attacker to read arbitrary files due to path traversal.

Sources

CVE-2026-PoCsPoC
A community-curated, verified collection of Proof-of-Concept exploits for CVEs disclosed in 2026.

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