Vulnerability · Published Aug 5, 2026 · Assigned by ibm
CVE-2026-9077Reliance on Untrusted Inputs in a Security Decision vulnerabilities in Model Context Protocol features
High 8.5
In plain English
A high-severity security flaw 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 0.4% (higher than 38% of all known vulnerabilities).
Severity (CVSS 3.1)8.5High
Exploit odds (30 days)0.4%top 61.9% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
IBM Langflow OSS 1.0.0 through 1.10.3 Langflow allows remote authenticated attackers to bypass localhost-only restrictions and write arbitrary MCP server configurations to IDE configuration files on the host system.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| IBM | Langflow OSS | 1.0.0 – through 1.10.3 |
Weakness: CWE-807 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:H/A:N
References
- https://www.ibm.com/support/pages/node/7282147 vendor-advisory, patch