Vulnerability · Published Sep 4, 2026 · Assigned by ibm

CVE-2026-19306Langflow is vulnerable to arbitrary local file read due to path traversal in ChatInput, bundle FileInput, and GitExtractor components

High 7.7

In plain English

A high-severity path traversal in Langflow OSS from IBM. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 46% of all known vulnerabilities).

Severity (CVSS 3.1)7.7High

Exploit odds (30 days)0.5%top 54.4% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

IBM Langflow OSS 1.0.0 through 1.11.2 allows an authenticated attacker to read arbitrary files from the server filesystem — including server secret material (secret_key, JWT signing keys, the application database, /proc/self/environ, and other tenants' upload directories) — by supplying absolute paths or traversal sequences in the files parameter of an authenticated build request. The file contents were embedded as text attachments in the language model prompt and transmitted to the configured model endpoint, resulting in confidential data exfiltration. This bypassed the LANGFLOW_RESTRICT_LOCAL_FILE_ACCESS=true containment boundary, which was enforced for other file-reading components but not for the Chat Input to Message attachment pipeline.

Affected products (as reported)

Vendor	Product	Versions
IBM	Langflow OSS	1.0.0 – through 1.11.2

Weakness: CWE-22 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

References

https://www.ibm.com/support/pages/node/7285641 vendor-advisory, patch