TI-2026-15749 Aliases CVE-2026-19306 GHSA-hh38-vgr5-vvww

Path traversal in IBM Langflow OSS

LOW 34CWE-22Published 2026-09-04 · Updated 2026-09-04

Key facts

Attack vector: Network
Privileges required: Low
User interaction: None
Attack complexity: Low
Impact type: Information disclosure
Confidentiality · integrity · availability: High · None · None
Fix status: No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-22 and the CVSS impact.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.0054 45th percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
IBM	Langflow OSS	1.0.0 – 1.11.2	—	No fix listed	CNA

Langflow OSS VendorIBM Affected 1.0.0 – 1.11.2 Fixed in — No fix listed CNA

CPE configurations NVD · 4

CPE	Versions	Role	Vendor
cpe:2.3:a:langflow:langflow::::::::	1.0.0 to before 1.11.3	Vulnerable	Langflow
cpe:2.3:o:apple:macos:-:::::::*	not specified by NVD	Running on	Apple
cpe:2.3:o:linux:linux_kernel:-:::::::*	not specified by NVD	Running on	Linux
cpe:2.3:o:microsoft:windows:-:::::::*	not specified by NVD	Running on	Microsoft

cpe:2.3:a:langflow:langflow:*:*:*:*:*:*:*:* Versions 1.0.0 to before 1.11.3 Vulnerable ·Langflow
cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Apple
cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Linux
cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Microsoft

Remediation

No fixed version listed by the sources yet.

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

Advisory · 2026-09-04
IBM Langflow OSS — ibm.com/support/pages/node/7285641
3 records Highest priority Priority LOW 3 LOW
Other records, highest priority first
- TI-2026-15745 Path traversal in IBM Langflow OSSPriority LOW 30
- TI-2026-15742 Path traversal in IBM Langflow OSSPriority LOW 30
Show all 3 records → Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2026-19306
2026-10-03 Alias added: GHSA-hh38-vgr5-vvww

References

Patch 1

https://www.ibm.com/support/pages/node/7285641

TI-2026-08085 Unauthenticated Remote Code Execution via Auto-Login Bypass and Code Validation KEVCVSS 3.1CRITICAL 9.8
TI-2022-23774 IBM Aspera Faspex code execution KEVCVSS 3.1CRITICAL 9.8
TI-2020-03794 Improper authentication in IBM Data Risk Manager KEVCVSS 3.1CRITICAL 9.8
TI-2019-03441 Code injection in IBM Planning Analytics KEVCVSS 3.1CRITICAL 9.8
TI-2017-03639 Improper handling of exceptional conditions in Apache Struts KEVCVSS 3.1CRITICAL 9.8
TI-2015-06198 Serialized-object interfaces in certain IBM analytics, business solutions, cognitive, IT… KEVCVSS 3.1CRITICAL 9.8

See all 9711 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences