High severity · published Aug 5, 2026
CVE-2026-9077
Reliance on Untrusted Inputs in a Security Decision vulnerabilities in Model Context Protocol features
8.5
CVSS
0.4%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:H/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
Low
Integrity
High
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 38% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
LO
Langflow OSS · IBM
1.0.0 through 1.10.3 · source: vendor
LA
Langflow · Langflow
1.0.0 before 1.11.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-9077
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-9077
Vendor Advisory
https://www.ibm.com/support/pages/node/7282147
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