CVE-2026-10547
published 2026-08-05CVE-2026-10547: IBM Langflow OSS 1.0.0 through 1.10.3 does not properly validate ownership in the deprecated POST /api/v1/build/{flow_id}/vertices endpoint, allowing an…
PriorityP346high8.1CVSS 3.1
AVNACLPRLUINSUCNIHAH
EPSS
0.22%
13.1th percentile
IBM Langflow OSS 1.0.0 through 1.10.3 does not properly validate ownership in the deprecated POST /api/v1/build/{flow_id}/vertices endpoint, allowing an authenticated user to inject arbitrary graph data into a shared cache for any flow. This may result in cross-user cache pollution, unauthorized workflow execution, or denial of service.
Affected
2 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| ibm | langflow_oss | 1.0.0 – 1.10.3 | — |
| langflow | langflow | >= 1.0.0 < 1.11.0 | 1.11.0 |
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VulDB
IBM Langflow OSS up to 1.10.3 vertices improper authorization
vuldb·2026-08-05·CVSS 5.9
CVE-2026-10547 [MEDIUM] IBM Langflow OSS up to 1.10.3 vertices improper authorization
A vulnerability, which was classified as critical, has been found in IBM Langflow OSS up to 1.10.3. The affected element is an unknown function of the file /api/v1/build/{flow_id}/vertices. This manipulation causes improper authorization.
The identification of this vulnerability is CVE-2026-10547. It is possible to initiate the attack remotely. There is no exploit available.
GHSA
IBM Langflow OSS 1.0.0 through 1.10.3 does not properly validate ownership in the deprecated POST /api/v1/build/{flow_id}/vertices endpoint, allowing an authenticated user to inject arbitrary graph da
ghsa_unreviewed·2026-08-05
CVE-2026-10547 [MEDIUM] CWE-284 IBM Langflow OSS 1.0.0 through 1.10.3 does not properly validate ownership in the deprecated POST /api/v1/build/{flow_id}/vertices endpoint, allowing an authenticated user to inject arbitrary graph da
IBM Langflow OSS 1.0.0 through 1.10.3 does not properly validate ownership in the deprecated POST /api/v1/build/{flow_id}/vertices endpoint, allowing an authenticated user to inject arbitrary graph data into a shared cache for any flow. This may result in cross-user cache pollution, unauthorized workflow execution, or denial of service.
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
2026-08-05
Published