Langflow OSS: .NET Misconfiguration: Use of Impersonation
CVE-2026-13442 is a high-severity .NET misconfiguration: use of impersonation vulnerability in Langflow OSS from IBM, with a CVSS 3.1 base score of 7.1 out of 10. It can be exploited remotely over the network by an attacker with a low-privileged account, without any action from a user. Affected Langflow OSS versions: 1.0.0 through 1.10.1. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 0.29% chance of exploitation within 30 days, which is low compared with other CVEs.
High severity with no evidence of exploitation so far.
What to do
- Update Langflow to 1.10.2 or a later version.
- Read the advisory on ibm.com for workarounds and exact fixed builds.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| IBM | Langflow OSS | 1.0.0 through 1.10.1 | Not stated |
| Langflow | Langflow | 1.0.0 up to, but not including, 1.10.2 | 1.10.2 |
Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- NetworkCan be exploited remotely over a network, including the internet.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- LowA basic user account is enough.
- User interaction
- NoneNo action by a victim is required.
- Scope
- UnchangedImpact stays within the vulnerable component.
- Confidentiality
- HighAll data handled by the component can be read.
- Integrity
- LowLimited modification of data is possible.
- Availability
- NoneAvailability is not affected.
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N. Scored by CNA (us.ibm.com).
Official description
IBM Langflow OSS 1.0.0 through 1.10.1 can allow an attacker to reuse another user's FAISS namespace to access owner-only vector content and influence later query results. This causes cross-user information disclosure and limited integrity impact through persistent poisoning of returned results.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: .NET Misconfiguration: Use of Impersonation
Allowing a.NET application to run at potentially escalated levels of access to the underlying operating and file systems can be dangerous and result in various forms of attacks.
How developers prevent this class of flaw
- Run the application with limited privilege to the underlying operating and file system.
More .NET Misconfiguration: Use of Impersonation vulnerabilities (CWE-520)
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: partial).
- Record last changed materially (score, affected products, status or references).
References
Advisories
Other vulnerabilities in Langflow OSS
- 8.1 High severity
- 9.8 Critical severity
- 8.8 High severity
- 8.8 High severity
- 8.8 High severity
- 8.8 High severity
Recent .NET Misconfiguration: Use of Impersonation vulnerabilities
- 7.4 High severity
- 7.5 High severity
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