CVE-2026-13442: IBM Langflow OSS · .NET Misconfiguration: Use of Impersonation
Affects IBM Langflow OSSSource CVE Database V5
Not known to be exploited · CVSS 7.1 High.
Data as of 27 Oct 2026, 17:11 UTC
- EPSS
- 0.2% chance of exploitation in 30 days – higher than 22% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:NExploitation evidence
Disclosed: evidence found.
CVE published 28 Jul 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| IBMLangflow OSS | Affected
| Fixed in– |
CPE configurations (2)
cpe:2.3:a:ibm:langflow_oss:1.0.0:*:*:*:*:*:*:*cpe:2.3:a:ibm:langflow_oss:1.10.1:*:*:*:*:*:*:*
AI-suggested
Until a fix is available, restrict access privileges to trusted users only and monitor for suspicious activity related to FAISS namespace usage. Avoid sharing credentials or namespaces across users to minimize risk.
Description
IBM Langflow OSS versions 1.0.0 through 1.10.1 contain a misconfiguration vulnerability involving the use of impersonation. This flaw allows an attacker with limited privileges to reuse another user's FAISS namespace, leading to unauthorized access to owner-only vector content and the ability to influence subsequent query results. The vulnerability results in cross-user information disclosure and limited integrity impact through persistent poisoning of returned results.